文档返回值是

{"type":"TYPE","media_id":"MEDIA_ID","created_at":123456789}

而我收到的返回值是

Array ( [type] => thumb [thumb_media_id] => YQUcJVVza0pSFllCGCU6nFf8xKByRu3wZZaSydvT5vWGv77L782r9G_4VSyBUxXo [created_at] => 1581991461 [item] => Array ( ) )

字段名为什么不一样