call-record-start-params

record call-record-start-params {
  call-control-id: string,
  channels: start-recording-request-channels-enum,
  client-state: option​<string>,
  command-id: option​<string>,
  format: start-recording-request-format-enum,
  max-length: option​<s32>,
  play-beep: option​<bool>,
}