send-fax-params

record send-fax-params {
  country: option​<string>,
  custom-string: option​<string>,
  file-url: string,
  from-op: option​<string>,
  from-email: option​<string>,
  list-id: option​<f64>,
  messages: list​<string>,
  schedule: option​<f64>,
  source: option​<string>,
  to: string,
}