post-voice-price-params

record post-voice-price-params {
  body: string,
  country: option​<string>,
  custom-string: option​<string>,
  lang: option​<string>,
  list-id: option​<f64>,
  require-input: option​<f64>,
  schedule: option​<f64>,
  source: option​<string>,
  to: string,
  voice: string,
}