GroupChat

{
    "create_time": 0,
    "created_at": 0,
    "group_id": "string",
    "last_update_statistic_time": 0,
    "member_count": 0,
    "name": "string",
    "notice": "string",
    "owner": "string",
    "today_decrease_user_count": 0,
    "today_increase_user_count": 0
}