接收消息

{
    "guid": "xxx",
    "notify_type": 11010,
    "data": {
        "seq": "7272646",
        "id": "1067188",
        "appinfo": "CAUQu+WWsAYYzKLu+vKDwOAXIMzQh6QF",
        "sender": "16888",
        "receiver": "788",
        "roomid": "0",
        "sendtime": 1711649467,
        "sender_name": "小助手",
        "content_type": 2,
        "referid": "0",
        "flag": 16777216,
        "content": "hello world",
        "at_list": [],
        "quote_content": "",
        "quote_appinfo": "",
        "send_flag": 1,
        "msg_type": 2
    }
}