# Updating TransactionAttributes
<a name="update-trans-attributes"></a>

To modify stored `TransactionAttributes`, update the contents of the JSON object with new values. In the following example, the keys `NewKey1` and `NewKey2` are added to the `TransactionAttributes`. These keys are paired with the values `NewValue1` and `NewValue2`, respectively.

```
{
    "SchemaVersion": "1.0",
    "Actions": [
        {
            "Type": "PlayAudio",
            "Parameters": {
                "ParticipantTag": "LEG-A",
                "AudioSource": {
                    "Type": "S3",
                    "BucketName": "mtg1-sipmedia-app-iad",
                    "Key": "Welcome3.wav"
                }
            }
        }
    ],
    "TransactionAttributes": {
        "NewKey1": "NewValue1",
        "NewKey2": "NewValue2"
    }
}
```

If, in the previous example, you passed `NewValue1` to `key1`, the existing value of `key1` would be replaced with `NewValue1`. However, passing a value to `NewKey1` creates a new key/value pair.