MsgCallbackResponseItem(MsgCallbackResponseItem)

{
    "wxpid": 0,
    "local_type": "string",
    "msg_type": 0,
    "sender": "string",
    "recipient": "string",
    "room_sender": "",
    "voice": "",
    "msgid": 0,
    "timestamp": 0,
    "msgsource": "",
    "content": ""
}