文本消息接收

{
    "flag": 16777216,
    "kf_id": 111111111, //客服id 只有客服消息接收才会有值否则就是0
    "receiver": 1688855587446404, //接收人
    "sender_name": "",
    "is_room": 0,
    "server_id": 7130717,
    "content": "32423423",
    "issync": false,
    "send_time": 1724034152,
    "sender": 7881302555913738,
    "referid": 0,
    "app_info": "3304183318011621608",
    "readuinscount": 0,
    "msg_id": 1011720,
    "msgtype": 2, //消息类型 0 和 2文本消息
    "atList": []
}