# Example of a two-way SMS message payload for Amazon SNS topics
<a name="two-way-sms-payload"></a>

When your number receives an SMS message, AWS End User Messaging SMS sends a JSON payload to an Amazon SNS topic that you designate. The JSON payload contains the message and related data, as in the following example:

```
{
  "originationNumber":"+14255550182",
  "destinationNumber":"+12125550101",
  "messageKeyword":"JOIN",
  "messageBody":"EXAMPLE",
  "inboundMessageId":"cae173d2-66b9-564c-8309-21f858e9fb84",
  "previousPublishedMessageId":"wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
}
```

The incoming message payload contains the following information:


****  

| Property | Description | 
| --- | --- | 
| `originationNumber` | The phone number that sent the incoming message to you (in other words, your customer's phone number). | 
| `destinationNumber` | The phone number that the customer sent the message to (your dedicated phone number). | 
| `messageKeyword` | The registered keyword that's associated with your dedicated phone number. | 
| `messageBody` | The message that the customer sent to you. | 
| `inboundMessageId` | The unique identifier for the incoming message. | 
| `previousPublishedMessageId` | The unique identifier of the message that the customer is responding to. |