CreatePayURLRequest

{
    "country": "BR",
    "currency": "BRL",
    "amount": 125.5,
    "merchant_transaction_reference": "TRX-2026-0001",
    "merchant_order_reference": "ORDER-2026-0001",
    "merchant_customer_id": "customer@email.com",
    "allowed_payment_methods": [
        "pix",
        "bank_transfer"
    ],
    "predefined_fields": [
        {
            "payment_method": "pix",
            "fields": {
                "document_number": "12345678909"
            }
        }
    ],
    "return_urls": {
        "success_url": "https://merchant.com/payment-success",
        "pending_url": "https://merchant.com/payment-pending",
        "failure_url": "https://merchant.com/payment-failure"
    }
}