CreateTransactionDto

{
    "productName": "Product Name",
    "productCount": "1",
    "productPrice": "1.00",
    "productCurrency": "USD",
    "coinId": 1,
    "buyerEmail": "buyer@nullpay.net",
    "redirectUrl": "https://nullpay.net/redirect",
    "custom": "custom data"
}