{
  "Engine": "neural",
  "LanguageCode": "en-US",
  "LexiconNames": "Joanna",
  "OutputFormat": "mp3",
  "SampleRate": "example-SampleRate",
  "SpeechMarkTypes": "example-SpeechMarkTypes",
  "Text": "Hello, this is a sample text for speech synthesis.",
  "TextType": "Hello, this is a sample text for speech synthesis.",
  "VoiceId": "voice-304"
}