curl --request POST \
  --url https://www.waffo.com/api/v1/subscription/manage \
  --header 'Content-Type: application/json' \
  --data '
{
  "subscriptionId": "<string>",
  "subscriptionRequest": "<string>"
}
'

{
  "code": "<string>",
  "msg": "<string>",
  "data": {
    "subscriptionRequest": "<string>",
    "merchantSubscriptionId": "<string>",
    "subscriptionId": "<string>",
    "managementUrl": "<string>",
    "expiredAt": "<string>",
    "subscriptionStatus": "<string>"
  }
}