{
  "request": {
    "method": "POST",
    "url": "https://api.mercadopago.com/v1/payments/1234567890/refunds",
    "headers": {
      "Authorization": "Bearer APP_USR-1234567890",
      "Content-Type": "application/json",
      "X-Idempotency-Key": "refund-ORDER-2026-0001-1"
    },
    "body": {
      "amount": 25.0
    }
  },
  "response": {
    "status": 201,
    "body": {
      "id": 9876543210,
      "payment_id": 1234567890,
      "amount": 25.0,
      "source": {
        "id": "987654321",
        "name": "Merchant Account",
        "type": "collector"
      },
      "date_created": "2026-05-25T14:10:00.000-03:00",
      "status": "approved",
      "unique_sequence_number": null
    }
  }
}