REST Example: Receive Transaction Responses Asynchronously {#ttp-sis-pymnt-svcs-cloud-txn-resp-async-sale-api-ex-rest}
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Request

```
{
    "serialNumber": "1850000000",
    "request": {
        "type": "PaymentRequest",
        "merchantReferenceCode": "058ed6c3430e436dab91b782f4113fd2",
        "amountDetails": {
            "amount": "1.00",
            "currency": "GBP"
        }
    }
}
```

Response to a Successful Request

```
{
    "interactionId": "0c292d7f-6bf9-460c-afc3-d75c189f2f99"
}
```

Response to an Unsuccessful Request  
When the request is unsuccessful, you will receive an error response with details.

```
{
      "type": "ErrorResponse",
      "message": "Error message to display.",
      "developerDescription": "Detailed description of error."
}
```