curl --request PUT \
  --url https://uat-api.clinkbill.com/api/coupon/{couponId}/name \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --header 'X-Timestamp: <api-key>' \
  --data '
{
  "newName": "Summer Sale 2026"
}
'

{
  "code": 200,
  "msg": "success"
}