diff --git a/src/Client.php b/src/Client.php
index d8ab568..a4a42b2 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -17,6 +17,7 @@
 use Http\Discovery\HttpAsyncClientDiscovery;
 use Http\Discovery\Psr17FactoryDiscovery;
 use Http\Message\Authentication\Bearer;
+use Paddle\SDK\Entities\DateTime;
 use Paddle\SDK\Logger\Formatter;
 use Paddle\SDK\Resources\Addresses\AddressesClient;
 use Paddle\SDK\Resources\Adjustments\AdjustmentsClient;
@@ -48,6 +49,7 @@
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
 use Symfony\Component\Serializer\NameConverter\CamelCaseToSnakeCaseNameConverter;
 use Symfony\Component\Serializer\Normalizer\BackedEnumNormalizer;
+use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
 use Symfony\Component\Serializer\Normalizer\JsonSerializableNormalizer;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 use Symfony\Component\Serializer\Serializer;
@@ -184,7 +186,12 @@ private function requestRaw(string $method, string|UriInterface $uri, array|\Jso
         $request = $this->requestFactory->createRequest($method, $uri);
 
         $serializer = new Serializer(
-            [new BackedEnumNormalizer(), new JsonSerializableNormalizer(), new ObjectNormalizer(nameConverter: new CamelCaseToSnakeCaseNameConverter())],
+            [
+                new BackedEnumNormalizer(),
+                new DateTimeNormalizer([DateTimeNormalizer::FORMAT_KEY => DateTime::PADDLE_RFC3339]),
+                new JsonSerializableNormalizer(),
+                new ObjectNormalizer(nameConverter: new CamelCaseToSnakeCaseNameConverter()),
+            ],
             [new JsonEncoder()],
         );
 
diff --git a/src/Entities/Event.php b/src/Entities/Event.php
index 729c2db..f5db070 100644
--- a/src/Entities/Event.php
+++ b/src/Entities/Event.php
@@ -6,6 +6,8 @@
 
 use Paddle\SDK\Entities\Event\EventTypeName;
 use Paddle\SDK\Notifications\Entities\Entity as NotificationEntity;
+use Paddle\SDK\Notifications\Entities\EntityFactory;
+use Paddle\SDK\Notifications\Events\UndefinedEvent;
 use Psr\Http\Message\ServerRequestInterface;
 
 abstract class Event implements Entity
@@ -22,28 +24,20 @@ protected function __construct(
     public static function from(array $data): self
     {
         $type = explode('.', (string) $data['event_type']);
-        $entity = $type[0] ?? 'Unknown';
         $identifier = str_replace('_', '', ucwords(implode('_', $type), '_'));
 
         /** @var class-string<Event> $event */
         $event = sprintf('\Paddle\SDK\Notifications\Events\%s', $identifier);
 
         if (! class_exists($event) || ! is_subclass_of($event, self::class)) {
-            throw new \UnexpectedValueException("Event type '{$identifier}' cannot be mapped to an object");
-        }
-
-        /** @var class-string<NotificationEntity> $entity */
-        $entity = sprintf('\Paddle\SDK\Notifications\Entities\%s', ucfirst($entity));
-
-        if (! class_exists($entity) || ! in_array(NotificationEntity::class, class_implements($entity), true)) {
-            throw new \UnexpectedValueException("Event type '{$identifier}' cannot be mapped to an object");
+            $event = UndefinedEvent::class;
         }
 
         return $event::fromEvent(
             $data['event_id'],
             EventTypeName::from($data['event_type']),
             DateTime::from($data['occurred_at']),
-            $entity::from($data['data']),
+            EntityFactory::create($data['event_type'], $data['data']),
             $data['notification_id'] ?? null,
         );
     }
diff --git a/src/Notifications/Entities/Adjustment.php b/src/Notifications/Entities/Adjustment.php
index ec4e291..0865628 100644
--- a/src/Notifications/Entities/Adjustment.php
+++ b/src/Notifications/Entities/Adjustment.php
@@ -38,7 +38,7 @@ private function __construct(
         public array $items,
         public AdjustmentTotals $totals,
         public PayoutTotalsAdjustment|null $payoutTotals,
-        public array $taxRatesUsed,
+        public array|null $taxRatesUsed,
         public \DateTimeInterface $createdAt,
         public \DateTimeInterface|null $updatedAt,
     ) {
@@ -59,7 +59,9 @@ public static function from(array $data): self
             items: array_map(fn (array $item): AdjustmentItem => AdjustmentItem::from($item), $data['items']),
             totals: AdjustmentTotals::from($data['totals']),
             payoutTotals: isset($data['payout_totals']) ? PayoutTotalsAdjustment::from($data['payout_totals']) : null,
-            taxRatesUsed: array_map(fn (array $taxRateUsed): AdjustmentTaxRatesUsed => AdjustmentTaxRatesUsed::from($taxRateUsed), $data['tax_rates_used'] ?? []),
+            taxRatesUsed: isset($data['tax_rates_used'])
+                ? array_map(fn (array $taxRateUsed): AdjustmentTaxRatesUsed => AdjustmentTaxRatesUsed::from($taxRateUsed), $data['tax_rates_used'] ?? [])
+                : null,
             createdAt: DateTime::from($data['created_at']),
             updatedAt: isset($data['updated_at']) ? DateTime::from($data['updated_at']) : null,
         );
diff --git a/src/Notifications/Entities/EntityFactory.php b/src/Notifications/Entities/EntityFactory.php
index 63c4a47..db0d9b8 100644
--- a/src/Notifications/Entities/EntityFactory.php
+++ b/src/Notifications/Entities/EntityFactory.php
@@ -14,6 +14,9 @@ public static function create(string $eventType, array $data): Entity
 
         /** @var class-string<Entity> $entity */
         $entity = sprintf('\Paddle\SDK\Notifications\Entities\%s', ucfirst($entity));
+        if (! class_exists($entity)) {
+            $entity = UndefinedEntity::class;
+        }
 
         if (! class_exists($entity) || ! in_array(Entity::class, class_implements($entity), true)) {
             throw new \UnexpectedValueException("Event type '{$identifier}' cannot be mapped to an object");
diff --git a/src/Notifications/Entities/Shared/PayoutTotalsAdjustment.php b/src/Notifications/Entities/Shared/PayoutTotalsAdjustment.php
index 551c994..eee9407 100644
--- a/src/Notifications/Entities/Shared/PayoutTotalsAdjustment.php
+++ b/src/Notifications/Entities/Shared/PayoutTotalsAdjustment.php
@@ -11,14 +11,19 @@
 
 namespace Paddle\SDK\Notifications\Entities\Shared;
 
-class PayoutTotalsAdjustment
+use Paddle\SDK\FiltersUndefined;
+use Paddle\SDK\Undefined;
+
+class PayoutTotalsAdjustment implements \JsonSerializable
 {
+    use FiltersUndefined;
+
     private function __construct(
         public string $subtotal,
         public string $tax,
         public string $total,
         public string $fee,
-        public ChargebackFee|null $chargebackFee,
+        public ChargebackFee|Undefined|null $chargebackFee,
         public string $earnings,
         public CurrencyCodePayouts $currencyCode,
     ) {
@@ -31,9 +36,22 @@ public static function from(array $data): self
             tax: $data['tax'],
             total: $data['total'],
             fee: $data['fee'],
-            chargebackFee: isset($data['chargeback_fee']) ? ChargebackFee::from($data['chargeback_fee']) : null,
+            chargebackFee: isset($data['chargeback_fee']) ? ChargebackFee::from($data['chargeback_fee']) : new Undefined(),
             earnings: $data['earnings'],
             currencyCode: CurrencyCodePayouts::from($data['currency_code']),
         );
     }
+
+    public function jsonSerialize(): array
+    {
+        return $this->filterUndefined([
+            'subtotal' => $this->subtotal,
+            'tax' => $this->tax,
+            'total' => $this->total,
+            'fee' => $this->fee,
+            'chargeback_fee' => $this->chargebackFee,
+            'earnings' => $this->earnings,
+            'currency_code' => $this->currencyCode,
+        ]);
+    }
 }
diff --git a/src/Notifications/Entities/UndefinedEntity.php b/src/Notifications/Entities/UndefinedEntity.php
new file mode 100644
index 0000000..abcfbaa
--- /dev/null
+++ b/src/Notifications/Entities/UndefinedEntity.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * |------
+ * | ! Generated code !
+ * | Altering this code will result in changes being overwritten |
+ * |-------------------------------------------------------------|.
+ */
+
+namespace Paddle\SDK\Notifications\Entities;
+
+class UndefinedEntity implements Entity, \JsonSerializable
+{
+    public function __construct(
+        public readonly array $data,
+    ) {
+    }
+
+    public static function from(array $data): self
+    {
+        return new self($data);
+    }
+
+    public function jsonSerialize(): \stdClass
+    {
+        return (object) $this->data;
+    }
+}
diff --git a/src/Notifications/Events/UndefinedEvent.php b/src/Notifications/Events/UndefinedEvent.php
new file mode 100644
index 0000000..7efef86
--- /dev/null
+++ b/src/Notifications/Events/UndefinedEvent.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Paddle\SDK\Notifications\Events;
+
+use Paddle\SDK\Entities\Event;
+use Paddle\SDK\Entities\Event\EventTypeName;
+use Paddle\SDK\Notifications\Entities\Entity;
+use Paddle\SDK\Notifications\Entities\UndefinedEntity;
+
+final class UndefinedEvent extends Event
+{
+    private function __construct(
+        string $eventId,
+        EventTypeName $eventType,
+        \DateTimeInterface $occurredAt,
+        public readonly UndefinedEntity $entity,
+        string|null $notificationId,
+    ) {
+        parent::__construct($eventId, $eventType, $occurredAt, $entity, $notificationId);
+    }
+
+    /**
+     * @param UndefinedEntity $data
+     */
+    public static function fromEvent(
+        string $eventId,
+        EventTypeName $eventType,
+        \DateTimeInterface $occurredAt,
+        Entity $data,
+        string|null $notificationId = null,
+    ): static {
+        return new self($eventId, $eventType, $occurredAt, $data, $notificationId);
+    }
+}
diff --git a/tests/Functional/Resources/Events/EventsClientTest.php b/tests/Functional/Resources/Events/EventsClientTest.php
index 489a010..304bef2 100644
--- a/tests/Functional/Resources/Events/EventsClientTest.php
+++ b/tests/Functional/Resources/Events/EventsClientTest.php
@@ -10,9 +10,12 @@
 use Paddle\SDK\Entities\Shared\Status;
 use Paddle\SDK\Entities\Shared\TaxMode;
 use Paddle\SDK\Environment;
+use Paddle\SDK\Notifications\Entities\Entity;
 use Paddle\SDK\Notifications\Entities\Product;
 use Paddle\SDK\Notifications\Entities\Shared\Interval;
 use Paddle\SDK\Notifications\Entities\Subscription\SubscriptionPrice;
+use Paddle\SDK\Notifications\Entities\UndefinedEntity;
+use Paddle\SDK\Notifications\Events\UndefinedEvent;
 use Paddle\SDK\Options;
 use Paddle\SDK\Resources\Events\Operations\ListEvents;
 use Paddle\SDK\Resources\Shared\Operations\List\Pager;
@@ -158,4 +161,37 @@ public function list_handles_subscription_events_with_price(): void
         self::assertSame('2023-04-24T14:11:13.014+00:00', $price1->createdAt->format(\DATE_RFC3339_EXTENDED));
         self::assertSame('2023-11-24T14:12:05.528+00:00', $price1->updatedAt->format(\DATE_RFC3339_EXTENDED));
     }
+
+    /**
+     * @test
+     */
+    public function list_handles_unknown_events(): void
+    {
+        $this->mockClient->addResponse(new Response(200, body: self::readRawJsonFixture('response/list_default')));
+        $events = $this->client->events->list(new ListEvents());
+        $request = $this->mockClient->getLastRequest();
+
+        self::assertInstanceOf(RequestInterface::class, $request);
+        self::assertEquals('GET', $request->getMethod());
+
+        $undefinedEvents = array_values(
+            array_filter(
+                iterator_to_array($events),
+                fn ($event) => (string) $event->eventType === 'unknown_entity.updated',
+            ),
+        );
+
+        $undefinedEvent = $undefinedEvents[0];
+        self::assertInstanceOf(UndefinedEvent::class, $undefinedEvent);
+        self::assertSame($undefinedEvent->entity, $undefinedEvent->data);
+        self::assertInstanceOf(UndefinedEntity::class, $undefinedEvent->entity);
+        self::assertInstanceOf(UndefinedEntity::class, $undefinedEvent->data);
+        self::assertInstanceOf(Entity::class, $undefinedEvent->data);
+        self::assertEquals(
+            [
+                'key' => 'value',
+            ],
+            $undefinedEvent->entity->data,
+        );
+    }
 }
diff --git a/tests/Functional/Resources/Events/_fixtures/response/list_default.json b/tests/Functional/Resources/Events/_fixtures/response/list_default.json
index 377afbd..b4eb9d6 100644
--- a/tests/Functional/Resources/Events/_fixtures/response/list_default.json
+++ b/tests/Functional/Resources/Events/_fixtures/response/list_default.json
@@ -2801,6 +2801,14 @@
                 "updated_at": "2023-11-23T15:33:19.238230688Z",
                 "billed_at": "2023-11-23T15:33:01.930479Z"
             }
+        },
+        {
+            "event_id": "evt_01hfyd0v4xppkwmjaca5xyzh5d",
+            "event_type": "unknown_entity.updated",
+            "occurred_at": "2023-11-23T15:33:19.645134Z",
+            "data": {
+                "key": "value"
+            }
         }
     ],
     "meta": {
diff --git a/tests/Functional/Resources/Notifications/NotificationsClientTest.php b/tests/Functional/Resources/Notifications/NotificationsClientTest.php
index 0e8dacc..af592e1 100644
--- a/tests/Functional/Resources/Notifications/NotificationsClientTest.php
+++ b/tests/Functional/Resources/Notifications/NotificationsClientTest.php
@@ -7,8 +7,12 @@
 use GuzzleHttp\Psr7\Response;
 use Http\Mock\Client as MockClient;
 use Paddle\SDK\Client;
+use Paddle\SDK\Entities\Notification;
 use Paddle\SDK\Entities\Notification\NotificationStatus;
 use Paddle\SDK\Environment;
+use Paddle\SDK\Notifications\Entities\Entity;
+use Paddle\SDK\Notifications\Entities\UndefinedEntity;
+use Paddle\SDK\Notifications\Events\UndefinedEvent;
 use Paddle\SDK\Options;
 use Paddle\SDK\Resources\Notifications\Operations\ListNotifications;
 use Paddle\SDK\Resources\Shared\Operations\List\Pager;
@@ -171,4 +175,40 @@ public function replay_hits_expected_uri(): void
         );
         self::assertSame('ntf_01h46h1s2zabpkdks7yt4vkgkc', $replayId);
     }
+
+    /**
+     * @test
+     */
+    public function list_handles_unknown_events(): void
+    {
+        $this->mockClient->addResponse(new Response(200, body: self::readRawJsonFixture('response/list_default')));
+        $notifications = $this->client->notifications->list(new ListNotifications());
+        $request = $this->mockClient->getLastRequest();
+
+        self::assertInstanceOf(RequestInterface::class, $request);
+        self::assertEquals('GET', $request->getMethod());
+
+        $undefinedEventNotifications = array_values(
+            array_filter(
+                iterator_to_array($notifications),
+                fn (Notification $notification) => (string) $notification->type === 'unknown_entity.updated',
+            ),
+        );
+
+        $undefinedEventNotification = $undefinedEventNotifications[0];
+        self::assertInstanceOf(Notification::class, $undefinedEventNotification);
+
+        $undefinedEvent = $undefinedEventNotification->payload;
+        self::assertInstanceOf(UndefinedEvent::class, $undefinedEvent);
+        self::assertSame($undefinedEvent->entity, $undefinedEvent->data);
+        self::assertInstanceOf(Entity::class, $undefinedEvent->data);
+        self::assertInstanceOf(UndefinedEntity::class, $undefinedEvent->data);
+        self::assertInstanceOf(UndefinedEntity::class, $undefinedEvent->entity);
+        self::assertEquals(
+            [
+                'key' => 'value',
+            ],
+            $undefinedEvent->entity->data,
+        );
+    }
 }
diff --git a/tests/Functional/Resources/Notifications/_fixtures/response/list_default.json b/tests/Functional/Resources/Notifications/_fixtures/response/list_default.json
index bd92d24..29b9362 100644
--- a/tests/Functional/Resources/Notifications/_fixtures/response/list_default.json
+++ b/tests/Functional/Resources/Notifications/_fixtures/response/list_default.json
@@ -452,6 +452,28 @@
             "retry_at": null,
             "times_attempted": 1,
             "notification_setting_id": "ntfset_01h7zcdzf04a7wvyja9k9p1n3p"
+        },
+        {
+            "id": "ntf_01h8441jz6fr97hv7zemswj8cw",
+            "type": "unknown_entity.updated",
+            "status": "delivered",
+            "payload": {
+                "data": {
+                    "key": "value"
+                },
+                "event_id": "evt_01h8441jx8x1q971q9ksksqh82",
+                "event_type": "unknown_entity.updated",
+                "occurred_at": "2023-08-18T10:46:18.792661Z",
+                "notification_id": "ntf_01h8441jz6fr97hv7zemswj8cw"
+            },
+            "occurred_at": "2023-08-18T10:46:18.792661Z",
+            "delivered_at": "2023-08-18T10:46:19.396422Z",
+            "replayed_at": null,
+            "origin": "event",
+            "last_attempt_at": "2023-08-18T10:46:18.887423Z",
+            "retry_at": null,
+            "times_attempted": 1,
+            "notification_setting_id": "ntfset_01h7zcdzf04a7wvyja9k9p1n3p"
         }
     ],
     "meta": {
diff --git a/tests/Functional/Resources/SimulationRunEvents/_fixtures/response/full_entity.json b/tests/Functional/Resources/SimulationRunEvents/_fixtures/response/full_entity.json
index 18b52cd..fe66a71 100644
--- a/tests/Functional/Resources/SimulationRunEvents/_fixtures/response/full_entity.json
+++ b/tests/Functional/Resources/SimulationRunEvents/_fixtures/response/full_entity.json
@@ -8,9 +8,9 @@
             "city": "New York",
             "region": "NY",
             "status": "active",
-            "created_at": "2024-04-12T06:42:58.785Z",
+            "created_at": "2024-04-12T06:42:58.785000Z",
             "first_line": "4050 Jefferson Plaza, 41st Floor",
-            "updated_at": "2024-04-12T06:42:58.785Z",
+            "updated_at": "2024-04-12T06:42:58.785000Z",
             "custom_data": null,
             "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
             "description": "Head Office",
diff --git a/tests/Functional/Resources/Simulations/SimulationsClientTest.php b/tests/Functional/Resources/Simulations/SimulationsClientTest.php
index 7477ac3..aea1e7d 100644
--- a/tests/Functional/Resources/Simulations/SimulationsClientTest.php
+++ b/tests/Functional/Resources/Simulations/SimulationsClientTest.php
@@ -70,6 +70,22 @@ public static function createOperationsProvider(): \Generator
             new Response(200, body: self::readRawJsonFixture('response/full_entity')),
             self::readRawJsonFixture('request/create_basic'),
         ];
+
+        yield 'Undefined' => [
+            new CreateSimulation(
+                notificationSettingId: 'ntfset_01j82d983j814ypzx7m1fw2jpz',
+                type: EventTypeName::from('unknown_entity.created'),
+                name: 'Some Simulation',
+                payload: EntityFactory::create('unknown_entity.created', ['some' => 'data']),
+            ),
+            new Response(200, body: self::readRawJsonFixture('response/full_entity')),
+            json_encode([
+                'notification_setting_id' => 'ntfset_01j82d983j814ypzx7m1fw2jpz',
+                'name' => 'Some Simulation',
+                'type' => 'unknown_entity.created',
+                'payload' => ['some' => 'data'],
+            ]),
+        ];
     }
 
     /**
diff --git a/tests/Functional/Resources/Simulations/_fixtures/request/address_created_payload.json b/tests/Functional/Resources/Simulations/_fixtures/request/address_created_payload.json
index 432e7b3..f160c96 100644
--- a/tests/Functional/Resources/Simulations/_fixtures/request/address_created_payload.json
+++ b/tests/Functional/Resources/Simulations/_fixtures/request/address_created_payload.json
@@ -3,9 +3,9 @@
   "city": "New York",
   "region": "NY",
   "status": "active",
-  "created_at": "2024-04-12T06:42:58.785Z",
+  "created_at": "2024-04-12T06:42:58.785000Z",
   "first_line": "4050 Jefferson Plaza, 41st Floor",
-  "updated_at": "2024-04-12T06:42:58.785Z",
+  "updated_at": "2024-04-12T06:42:58.785000Z",
   "custom_data": null,
   "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
   "description": "Head Office",
diff --git a/tests/Functional/Resources/Simulations/_fixtures/request/create_basic.json b/tests/Functional/Resources/Simulations/_fixtures/request/create_basic.json
index 75cfafe..6577e27 100644
--- a/tests/Functional/Resources/Simulations/_fixtures/request/create_basic.json
+++ b/tests/Functional/Resources/Simulations/_fixtures/request/create_basic.json
@@ -7,9 +7,9 @@
         "city": "New York",
         "region": "NY",
         "status": "active",
-        "created_at": "2024-04-12T06:42:58.785Z",
+        "created_at": "2024-04-12T06:42:58.785000Z",
         "first_line": "4050 Jefferson Plaza, 41st Floor",
-        "updated_at": "2024-04-12T06:42:58.785Z",
+        "updated_at": "2024-04-12T06:42:58.785000Z",
         "custom_data": null,
         "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
         "description": "Head Office",
diff --git a/tests/Functional/Resources/Simulations/_fixtures/request/update_full.json b/tests/Functional/Resources/Simulations/_fixtures/request/update_full.json
index 56b48a8..6485a62 100644
--- a/tests/Functional/Resources/Simulations/_fixtures/request/update_full.json
+++ b/tests/Functional/Resources/Simulations/_fixtures/request/update_full.json
@@ -8,6 +8,7 @@
         "action": "refund",
         "transaction_id": "txn_01hvcc93znj3mpqt1tenkjb04y",
         "subscription_id": "sub_01hvccbx32q2gb40sqx7n42430",
+        "tax_rates_used": null,
         "customer_id": "ctm_01hrffh7gvp29kc7xahm8wddwa",
         "reason": "error",
         "credit_applied_to_balance": null,
diff --git a/tests/Functional/Resources/Simulations/_fixtures/response/full_entity.json b/tests/Functional/Resources/Simulations/_fixtures/response/full_entity.json
index 6097b6a..379be80 100644
--- a/tests/Functional/Resources/Simulations/_fixtures/response/full_entity.json
+++ b/tests/Functional/Resources/Simulations/_fixtures/response/full_entity.json
@@ -10,9 +10,9 @@
             "city": "New York",
             "region": "NY",
             "status": "active",
-            "created_at": "2024-04-12T06:42:58.785Z",
+            "created_at": "2024-04-12T06:42:58.785000Z",
             "first_line": "4050 Jefferson Plaza, 41st Floor",
-            "updated_at": "2024-04-12T06:42:58.785Z",
+            "updated_at": "2024-04-12T06:42:58.785000Z",
             "custom_data": null,
             "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
             "description": "Head Office",
diff --git a/tests/Unit/Entities/EventTest.php b/tests/Unit/Entities/EventTest.php
index 6e6a046..fc83893 100644
--- a/tests/Unit/Entities/EventTest.php
+++ b/tests/Unit/Entities/EventTest.php
@@ -333,6 +333,27 @@ public static function eventDataProvider(): iterable
         }
     }
 
+    /**
+     * @test
+     */
+    public function it_creates_event_for_undefined_entity(): void
+    {
+        $event = Event::from([
+            'event_id' => 'evt_01h8bzakzx3hm2fmen703n5q45',
+            'event_type' => 'unknown_event.created',
+            'occurred_at' => '2023-08-21T11:57:47.390028Z',
+            'notification_id' => 'ntf_01h8bzam1z32agrxjwhjgqk8w6',
+            'data' => [
+                'some' => 'data',
+            ],
+        ]);
+
+        self::assertSame('ntf_01h8bzam1z32agrxjwhjgqk8w6', $event->notificationId);
+
+        self::assertInstanceOf(Event::class, $event);
+        self::assertInstanceOf(Entity::class, $event->data);
+    }
+
     /**
      * @test
      */
diff --git a/tests/Unit/Entities/_fixtures/notification/entity/address.created.json b/tests/Unit/Entities/_fixtures/notification/entity/address.created.json
index 10dcb1e..6103eac 100644
--- a/tests/Unit/Entities/_fixtures/notification/entity/address.created.json
+++ b/tests/Unit/Entities/_fixtures/notification/entity/address.created.json
@@ -3,9 +3,9 @@
     "city": "New York",
     "region": "NY",
     "status": "active",
-    "created_at": "2024-04-12T06:42:58.785Z",
+    "created_at": "2024-04-12T06:42:58.785000Z",
     "first_line": "4050 Jefferson Plaza, 41st Floor",
-    "updated_at": "2024-04-12T06:42:58.785Z",
+    "updated_at": "2024-04-12T06:42:58.785000Z",
     "custom_data": null,
     "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
     "description": "Head Office",