How to stop streaming from "Smart Home Camera Skill"?

It shows real-time camera stream to user with "Smart Home Camera Skill". "echo show" should be automatically stopped after 1 minute from the start of playback. What should I do?

my skill response is :

{
    "event": {
        "payload": {
            "cameraStreams": [
                {
                    "protocol": "RTSP",
                    "expirationTime": "2018-02-23T09:58:32.29Z",
                    "authorizationType": "NONE",
                    "idleTimeoutSeconds": 30,
                    "audioCodec": "G711",
                    "uri": "rtsp://streamurl",
                    "resolution": {
                        "width": 1280,
                        "height": 720
                    },
                    "videoCodec": "H264"
                }
            ]
        },
        "header": {
            "payloadVersion": "3",
            "namespace": "Alexa.CameraStreamController",
            "name": "Response",
            "messageId": "......",
            "correlationToken": "........"
        }
    }
}