curl --request POST \
  --url https://dev.interface.monirates.com/v1/payment-link/decline \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "reason": "<string>"
}
'

{
  "success": true,
  "message": "<string>",
  "data": {}
}