curl --request POST \
  --url https://uat-api.clinkbill.com/api/promotion-code/{id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --header 'X-Timestamp: <api-key>' \
  --data '
{
  "code": "SUMMER2026",
  "firstOrderOnly": true,
  "maxRedemptionLimit": 100,
  "validPeriodStart": 1780660800000,
  "validPeriodEnd": 1783252800000
}
'

{
  "code": 200,
  "msg": "success",
  "data": {
    "couponId": "<string>",
    "promotionCodeId": "<string>",
    "code": "<string>",
    "status": "active",
    "firstOrderOnly": true,
    "redemptionCount": 123,
    "maxRedemptionLimit": 123,
    "validPeriodEnd": 1754819711382,
    "createTime": 1754819711382,
    "mirroring": true
  }
}