curl --location --request POST 'https://pay-gateway1.uat.useepay.com/api' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'amount=1' \
--data-urlencode 'echoParam=echoParam' \
--data-urlencode 'merchantNo=500000000007362' \
--data-urlencode 'notifyUrl=https://gatewaytest.useepay.com/notifyV2u0' \
--data-urlencode 'originalTransactionId=754ae22f-4e66-4ebf-9e0e-d7216125177e' \
--data-urlencode 'sign=7d7ddf63b857946a736ce3471427ba53' \
--data-urlencode 'signType=MD5' \
--data-urlencode 'transactionId=202305280850422' \
--data-urlencode 'transactionType=refund' \
--data-urlencode 'version=1.0'