• command (string, required)

• text (string, required) Transcribed text from the voice channel. This is the speech-to-text output of the incoming audio.

• sttLanguage (string, required) BCP-47 language tag used for speech-to-text transcription of the inbound audio.

• isCorrection (boolean, required) Indicates whether this message corrects a previous transcription.

This occurs when additional speech is detected after a pause, refining the earlier transcription result.