{
    "mch_id": "100000981",
    "appid": "wxcbda96de0b165486",
    "nonce_str": "5K8264ILTKCH16CQ2502SI8ZNMTM67VS",
    "sign_type": "HMAC-SHA256",
    "sign": "EE088059BBC9141264F8D14293AD6C4BB94CEA8C08AA98FBF93E262D445F8FF5",
    "plate_number": "粤A00000",
    "vehicle_event_type": "NORMAL",
    "vehicle_event_createtime": "20180101100000"
}