diff --git a/httpdocs/src/Controller/CreateMediaObjectAction.php b/httpdocs/src/Controller/CreateMediaObjectAction.php
index ca42e36..1da1219 100644
--- a/httpdocs/src/Controller/CreateMediaObjectAction.php
+++ b/httpdocs/src/Controller/CreateMediaObjectAction.php
@@ -13,8 +13,8 @@ use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Attribute\AsController;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Symfonycasts\MicroMapper\MicroMapperInterface;
-use ApiPlatform\Core\Api\IriConverterInterface;
 use Symfony\Component\Serializer\SerializerInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
 #[AsController]
 final class CreateMediaObjectAction extends AbstractController
@@ -22,7 +22,8 @@ final class CreateMediaObjectAction extends AbstractController
     public function __construct(
         private MicroMapperInterface $microMapper,
         private EntityManagerInterface $em,
-        private SerializerInterface $serializer
+        private SerializerInterface $serializer,
+        private NormalizerInterface $normalizer
     ) {
     }
 
@@ -46,10 +47,16 @@ final class CreateMediaObjectAction extends AbstractController
 
         $mediaObjectApi = $this->microMapper->map($mediaObject, MediaObjectApi::class);
 
-        // Serialisieren Sie das Objekt mit dem API Platform Serializer
-        $jsonContent = $this->serializer->serialize($mediaObjectApi, 'jsonld', ['groups' => 'media_object:read']);
+        // Normalisieren für jsonld Format (gibt die Metadaten)
+        $normalized = $this->normalizer->normalize($mediaObjectApi, 'jsonld', ['groups' => 'media_object:read']);
 
-        // Erstellen Sie eine JsonResponse mit dem serialisierten Inhalt
-        return new JsonResponse($jsonContent, 200, [], true);
+        // Manuell die fehlenden Felder hinzufügen
+        $normalized['dbId'] = $mediaObjectApi->dbId;
+        $normalized['contentUrl'] = $mediaObjectApi->contentUrl;
+        $normalized['filePath'] = $mediaObjectApi->filePath;
+        $normalized['createdAt'] = $mediaObjectApi->createdAt->format('c');
+
+        // In JSON umwandeln
+        return new JsonResponse($normalized, 201);
     }
 }
\ No newline at end of file