{   
  "ErrorMessage": {         
    "_media-type": "application/vnd.ez.api.ErrorMessage+json",            
    "errorCode": 500,         
    "errorMessage": "Internal Server Error",         
    "errorDescription": "Property 'alternativeText' not found on class     
    'eZ\Publish\Core\FieldType\BinaryFile\Value'",     
  } 
}