"messageId": "{{STRING}}",
"dialogRequestId": "{{STRING}}",
"playServiceId": "{{STRING}}",
"domainTypes": ["{{STRING}}"],
"playServiceId" : "playServiceId"
"timeoutMilliseconds": {{LONG}},
"silenceIntervalInMilliseconds": {{LONG}},
"maxSpeechDurationMilliseconds": {{LONG}}
"listenTimeoutFailBeep": {{BOOLEAN}}