{
   "id": "7bb6f1f3-d280-4b0c-a74f-90471ea69426", // Auto-generated UUID
   "paymentMethod": "paydirekt",
   "returnUrl": "http://example.com", // URL to return after payment completion.
   "webhookUrl": "https://example.com", // URL to receive webhook notification.
   "transaction":{
      "reference": "test-1111", // Max 20 characters
      "currency": "EUR", // ISO4217 format
      "amount": 2000, // The amount is in cents, 2000 = 20 EUR. Has to be sum of amounts * quantity in lines.
      "description": "test-1444",
      "lines":[
         {
            "name": "Some Voucher - 20 EUR", // Max 100 characters. Name of product.
            "category": "PREPAID-VOUCHER", // Max 100 characters.
            "brand": "alphacomm", // Max 100 characters.
            "quantity": 1, // Number of items
            "amount": 2000 // The amount is in cents, 2000 = 20 EUR
         }
      ]
   },
   "paydirekt": {
      "email": "test@test.com"
   }
}