allow @id, @context and @type

Author: ili101

src/Serializer/AbstractItemNormalizer.php

@@ -426,6 +426,9 @@ protected function getAllowedAttributes(string|object $classOrObject, array $con
         $propertyNames = $this->propertyNameCollectionFactory->create($resourceClass, $options);
 
         $allowedAttributes = [];
+        if ($context['api_denormalize'] ?? false) {
+            $allowedAttributes = ['@id', '@type', '@context'];
+        }
         foreach ($propertyNames as $propertyName) {
             $propertyMetadata = $this->propertyMetadataFactory->create($resourceClass, $propertyName, $options);