群成员信息

{
    "group_id": 0,
    "user_id": 0,
    "nickname": "string",
    "card": "string",
    "sex": "string",
    "age": 0,
    "area": "string",
    "join_time": 0,
    "last_sent_time": 0,
    "level": "string",
    "role": "string",
    "unfriendly": true,
    "title": "string",
    "title_expire_time": 0,
    "card_changeable": true
}