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# 设置 TransactionAttributes
<a name="set-trans-attributes"></a>

以下示例说明如何在[PlayAudio](play-audio.md)操作`TransactionAttributes`旁边设置并将属性从 AWS Lambda 函数传递给 SIP 媒体应用程序。

```
{
    "SchemaVersion": "1.0",
    "Actions": [
        {
            "Type": "PlayAudio",
            "Parameters": {
                "ParticipantTag": "{{LEG-A}}",
                "AudioSource": {
                    "Type": "S3",
                    "BucketName": "{{mtg1-sipmedia-app-iad}}",
                    "Key": "{{Welcome3.wav}}"
                }
            }
        }
    ],
    "TransactionAttributes": {
        "{{key1}}": "{{value1}}",
        "{{key2}}": "{{value2}}"
    }
}
```