{
  "Engine": "generative",
  "LanguageCode": "en-US",
  "LexiconNames": [
    "Joanna"
  ],
  "OutputFormat": "mp3",
  "SampleRate": "24000",
  "SpeechMarkTypes": [
    "viseme"
  ],
  "Text": "Hello, this is a sample text for speech synthesis.",
  "TextType": "ssml",
  "VoiceId": "voice-292"
}