验证优惠券

{
  "code": 0,
  "msg": "",
  "data": {
    "valid": false,
    "reason": "",
    "couponId": 0,
    "couponNo": "",
    "couponType": 0,
    "status": 0,
    "templateName": "",
    "discountRate": 0,
    "maxDiscount": 0,
    "thresholdAmount": 0,
    "reduceAmount": 0,
    "giftDescription": "",
    "expireTime": ""
  }
}