docs: def smart_email_send(self, smart_email_id, to, consent_to_track, cc=None, bcc=None, attachments=None, data=None, add_recipients_to_list=None):
          """Sends the smart email."""
          validate_consent_to_track(consent_to_track)
          body = {
              "To": to,
              "CC": cc,
              "BCC": bcc,
              "Attachments": attachments,
              "Data": data,
              "AddRecipientsToList": add_recipients_to_list,
              "ConsentToTrack": consent_to_track,
          }
          response = self._post("/transactional/smartEmail/%s/send" %
                                smart_email_id, json.dumps(body))
          return json_to_py(response)