curl -X POST https://api.rebellapp.com/v1/payments/retailPay \
  -H "Content-Type: application/json" \
  -H "Client-Id: YOUR_CLIENT_ID" \
  -H "Request-Time: 2024-01-10T12:00:00Z" \
  -H "Signature: algorithm=SHA256withRSA, keyVersion=1, signature=BASE64_SIGNATURE" \
  -d '{
    "productCode": "5105010010000100040",
    "paymentRequestId": "REQ_abc_456",
    "paymentAuthCode": "289123456789012345",
    "paymentAmount": {
      "currency": "EUR",
      "value": 2500
    },
    "order": {
      "orderDescription": "In-store purchase"
    },
    "paymentNotifyUrl": "https://merchant.example.com/webhook"
  }'

{
  "result": {
    "resultStatus": "S",
    "resultCode": "<string>",
    "resultMessage": "<string>"
  },
  "paymentRequestId": "<string>",
  "paymentId": "<string>",
  "paymentTime": "2023-11-07T05:31:56Z",
  "paymentAmount": {
    "currency": "<string>",
    "value": 123
  }
}