curl --request POST \
  --url https://uat-api.clinkbill.com/api/subscription \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --header 'X-Timestamp: <api-key>' \
  --data '
{
  "customerId": "cus_xxxxx",
  "productId": "prd_xxxxx",
  "priceId": "price_xxxxx",
  "paymentInstrumentId": "pi_xxxxx",
  "paymentMethodType": "CARD",
  "paymentCurrency": "USD",
  "returnUrl": "https://merchant.example.com/subscription/return",
  "merchantReferenceId": "sub_ref_123",
  "metadata": {
    "orderNo": "SO-10001"
  },
  "platformType": "WEB",
  "deviceType": "Android"
}
'

{
  "code": 200,
  "msg": "success",
  "data": {
    "subscriptionId": "<string>",
    "sessionId": "<string>",
    "action": {
      "redirectUrl": "<string>",
      "walletHandleRedirectOrDisplayQrCode": {
        "imageUrlPng": "<string>",
        "imageUrlSvg": "<string>",
        "imageDataUrl": "<string>",
        "hostedInstructionsUrl": "<string>",
        "mobileAuthUrl": "<string>",
        "fallbackUrl": "<string>",
        "packageName": "<string>",
        "expiresAt": 123,
        "expiresSecond": 123
      },
      "paymentMethodType": "<string>",
      "postData": {}
    },
    "amount": 123,
    "currency": "<string>",
    "orderId": "<string>",
    "invoiceId": "<string>"
  }
}