{
  "request": {
    "method": "POST",
    "url": "https://api.breadpayments.com/transactions/txn_AbCdEf/shipping",
    "headers": {
      "Authorization": "Bearer YOUR_LEGACY_TOKEN",
      "Content-Type": "application/json"
    },
    "body": {
      "carrier": "UPS",
      "trackingNumber": "1Z999AA10123456784",
      "shippedAt": "2026-05-24T09:00:00Z"
    }
  },
  "response": {
    "status": 200,
    "body": {
      "carrier": "UPS",
      "trackingNumber": "1Z999AA10123456784",
      "shippedAt": "2026-05-24T09:00:00Z"
    }
  }
}