curl --request POST \
  --url https://uat-api.clinkbill.com/api/subscription/{id}/update/confirm \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --header 'X-Timestamp: <x-timestamp>' \
  --data '
{
  "priceSnapshotId": "priceSnapshotId_xxxx",
  "promotionCode": "SUMMER25"
}
'

HttpResponse<String> response = Unirest.post("https://uat-api.clinkbill.com/api/subscription/{id}/update/confirm")
  .header("X-Timestamp", "<x-timestamp>")
  .header("X-API-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"priceSnapshotId\": \"priceSnapshotId_xxxx\",\n  \"promotionCode\": \"SUMMER25\"\n}")
  .asString();

import requests

url = "https://uat-api.clinkbill.com/api/subscription/{id}/update/confirm"

payload = {
    "priceSnapshotId": "priceSnapshotId_xxxx",
    "promotionCode": "SUMMER25"
}
headers = {
    "X-Timestamp": "<x-timestamp>",
    "X-API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-Timestamp': '<x-timestamp>',
    'X-API-KEY': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({priceSnapshotId: 'priceSnapshotId_xxxx', promotionCode: 'SUMMER25'})
};

fetch('https://uat-api.clinkbill.com/api/subscription/{id}/update/confirm', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "code": 200,
  "msg": "success",
  "data": {
    "subscriptionId": "<string>",
    "code": "<string>",
    "declinedCode": "<string>",
    "message": "<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": {}
    },
    "subscription": {
      "subscriptionId": "<string>",
      "customerId": "<string>",
      "productId": "<string>",
      "priceId": "<string>",
      "priceSnapshotId": "<string>",
      "createTime": 123,
      "quantity": 123,
      "paymentMethodType": "<string>",
      "paymentInstrumentId": "<string>",
      "status": "<string>",
      "billing": "<string>",
      "recurringInvoiceItem": {
        "invoiceItemId": "<string>",
        "amount": 123,
        "discountAmount": 123,
        "paymentAmount": 123,
        "couponTerms": "<string>",
        "promotionCode": "<string>",
        "periodStart": 123,
        "periodEnd": 123,
        "proration": true,
        "price": {
          "productId": "<string>",
          "productName": "<string>",
          "priceId": "<string>",
          "priceSnapshotId": "<string>",
          "unitAmount": 123,
          "quantity": 123,
          "recurring": {
            "trialPeriodDays": 123,
            "intervalCount": 123
          }
        }
      },
      "merchantReference": "<string>",
      "sessionId": "<string>",
      "trialStart": 123,
      "trialEnd": 123,
      "currentPeriodStart": 123,
      "currentPeriodEnd": 123,
      "cancelAt": 123,
      "cancelAtPeriodEnd": true,
      "canceledAt": 123,
      "cancelReason": "<string>",
      "upcomingInvoiceItem": {
        "invoiceItemId": "<string>",
        "amount": 123,
        "discountAmount": 123,
        "paymentAmount": 123,
        "couponTerms": "<string>",
        "promotionCode": "<string>",
        "periodStart": 123,
        "periodEnd": 123,
        "proration": true,
        "price": {
          "productId": "<string>",
          "productName": "<string>",
          "priceId": "<string>",
          "priceSnapshotId": "<string>",
          "unitAmount": 123,
          "quantity": 123,
          "recurring": {
            "trialPeriodDays": 123,
            "intervalCount": 123
          }
        }
      },
      "scheduledPhases": [
        {
          "sequence": 2,
          "effectiveCycle": 2,
          "priceSnapshotId": "<string>",
          "quantity": 2,
          "metadata": {}
        }
      ],
      "elapsedCycles": 123,
      "metadata": {}
    }
  }
}

"<string>"