| Name | Type | Description | Notes |
|---|---|---|---|
| overlay | Boolean | When enabled, it stops the audio being played in the overlay queue. | [optional] |
| stop | String | Use `current` to stop the current audio being played. Use `all` to stop the current audio file being played and clear all audio files from the queue. | [optional] |
| clientState | String | Use this field to add state to every subsequent webhook. It must be a valid Base-64 encoded string. | [optional] |
| commandId | String | Use this field to avoid duplicate commands. Telnyx will ignore any command with the same `command_id` for the same `call_control_id`. | [optional] |