const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.paddle.com/subscriptions/{subscription_id}/update-payment-method-transaction', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": {
    "id": "txn_01jspbekkwn03q6zp8bezp3tv2",
    "status": "ready",
    "customer_id": "ctm_01jspbafm96p2ppbe85921nf6p",
    "address_id": "add_01jspbafmrn485m030p7kx9dbr",
    "business_id": null,
    "custom_data": null,
    "origin": "subscription_payment_method_change",
    "collection_mode": "automatic",
    "subscription_id": "sub_01jspbbyjtkycfmjf7ye85yvp2",
    "invoice_id": null,
    "invoice_number": null,
    "discount_id": null,
    "billing_details": null,
    "billing_period": {
      "starts_at": "2025-04-25T11:29:46.915899Z",
      "ends_at": "2025-04-25T11:29:46.915899Z"
    },
    "currency_code": "USD",
    "created_at": "2025-04-25T11:31:14.986430069Z",
    "updated_at": "2025-04-25T11:31:14.986430069Z",
    "billed_at": null,
    "revised_at": null,
    "items": [
      {
        "price": {
          "id": "pri_01jspaymrp8mpq0fxdgwxy5vwh",
          "product_id": "pro_01jspay5m2ry6s10w1m9xfthvz",
          "type": "standard",
          "description": "Get exclusive access to our expert team of product specialists, available to help you make the most of your AeroEdit subscription.",
          "name": "AeroEdit VIP",
          "billing_cycle": {
            "interval": "month",
            "frequency": 1
          },
          "tax_mode": "account_setting",
          "unit_price": {
            "amount": "30000",
            "currency_code": "USD"
          },
          "unit_price_overrides": [],
          "custom_data": null,
          "status": "active",
          "quantity": {
            "minimum": 1,
            "maximum": 1
          },
          "import_meta": null,
          "created_at": "2025-04-25T11:22:31.574394Z",
          "updated_at": "2025-04-25T11:22:31.574395Z"
        },
        "quantity": 1,
        "proration": {
          "rate": "0",
          "billing_period": {
            "starts_at": "2025-04-25T11:29:46.915899Z",
            "ends_at": "2025-05-25T11:29:46.915899Z"
          }
        }
      }
    ],
    "details": {
      "tax_rates_used": [
        {
          "tax_rate": "0.08875",
          "totals": {
            "subtotal": "0",
            "discount": "0",
            "tax": "0",
            "total": "0"
          }
        }
      ],
      "totals": {
        "subtotal": "0",
        "tax": "0",
        "discount": "0",
        "total": "0",
        "fee": null,
        "credit": "0",
        "credit_to_balance": "0",
        "balance": "0",
        "grand_total": "0",
        "earnings": null,
        "currency_code": "USD"
      },
      "adjusted_totals": {
        "subtotal": "0",
        "tax": "0",
        "total": "0",
        "grand_total": "0",
        "fee": null,
        "earnings": null,
        "currency_code": "USD"
      },
      "payout_totals": null,
      "adjusted_payout_totals": null,
      "line_items": [
        {
          "id": "txnitm_01jspbekwp0ajkz6qxj4wdmzf3",
          "price_id": "pri_01jspaymrp8mpq0fxdgwxy5vwh",
          "quantity": 1,
          "totals": {
            "subtotal": "0",
            "tax": "0",
            "discount": "0",
            "total": "0"
          },
          "product": {
            "id": "pro_01jspay5m2ry6s10w1m9xfthvz",
            "name": "AeroEdit VIP",
            "type": "standard",
            "tax_category": "standard",
            "description": "Get exclusive access to our expert team of product specialists, available to help you make the most of your AeroEdit subscription.",
            "image_url": "https://paddle.s3.amazonaws.com/user/165798/qgyipKJwRtq98YNboipo_vip-support.png",
            "custom_data": null,
            "status": "active",
            "import_meta": null,
            "created_at": "2025-04-25T11:22:16.066Z",
            "updated_at": "2025-04-25T11:22:16.066Z"
          },
          "tax_rate": "0.08875",
          "unit_totals": {
            "subtotal": "0",
            "discount": "0",
            "tax": "0",
            "total": "0"
          },
          "proration": {
            "rate": "0",
            "billing_period": {
              "starts_at": "2025-04-25T11:29:46.915899Z",
              "ends_at": "2025-05-25T11:29:46.915899Z"
            }
          }
        }
      ]
    },
    "payments": [],
    "checkout": {
      "url": "https://aeroedit.com/pay?_ptxn=txn_01hv8zbfzrnfr6b4hfexhk4e7h"
    },
    "customer": {
      "id": "ctm_01jspbafm96p2ppbe85921nf6p",
      "name": null,
      "email": "[email protected]",
      "locale": "en",
      "marketing_consent": false,
      "custom_data": null,
      "status": "active",
      "created_at": "2025-04-25T11:28:59.529Z",
      "updated_at": "2025-04-25T11:28:59.529Z",
      "import_meta": null
    },
    "address": {
      "id": "add_01jspbafmrn485m030p7kx9dbr",
      "customer_id": "ctm_01jspbafm96p2ppbe85921nf6p",
      "description": null,
      "first_line": null,
      "second_line": null,
      "city": null,
      "postal_code": "10021",
      "region": null,
      "country_code": "US",
      "status": "active",
      "custom_data": null,
      "import_meta": null,
      "created_at": "2025-04-25T11:28:59.544Z",
      "updated_at": "2025-04-25T11:28:59.544Z"
    },
    "adjustments_totals": {
      "subtotal": "0",
      "tax": "0",
      "total": "0",
      "fee": "0",
      "earnings": "0",
      "breakdown": {
        "credit": "0",
        "refund": "0",
        "chargeback": "0"
      },
      "currency_code": "USD"
    },
    "available_payment_methods": [
      "apple_pay",
      "card",
      "paypal",
      "google_pay"
    ]
  },
  "meta": {
    "request_id": "c73663c7-7308-4af5-9cf2-4cc9f7372196"
  }
}