ChatSession

{
    "id": "string",
    "created_at": 0,
    "staff_id": "string",
    "target_id": "string",
    "name": "string",
    "avatar": "string",
    "agree_msgaudit": true,
    "agree_time": 0,
    "last_msg_thumb": "string",
    "last_msg_time": 0,
    "session_type": "string",
    "type": 0,
    "unionid": "string"
}