Play audio URL

Play an audio file on the call. If multiple play audio commands are issued consecutively, the audio files will be placed in a queue awaiting playback.

Notes:

• When overlay is enabled, target_legs is limited to self.
• A customer cannot Play Audio with overlay=true unless there is a Play Audio with overlay=false actively playing.

Expected Webhooks:

• call.playback.started
• call.playback.ended