群聊_群创建成功（加入）

{
  "data": {
    "chatroom": "51******6@chatroom",
    "member_list": [
      {
        "nickname": "成员昵称1",
        "wxid": "wxid_8*****12"
      },
      {
        "nickname": "成员昵称2",
        "wxid": "wxid_b*****12"
      }
    ],
    "membercount": 2
  },
  "pid": 207672,
  "port": 8981,
  "type": 13001
}