code: public SendMOHFilesResponse sendMOHFiles(File musicFile) throws ApiException {
          ApiResponse<SendMOHFilesResponse> resp = sendMOHFilesWithHttpInfo(musicFile);
          return resp.getData();
      }
docs: Upload WAV file to MOH.
  Upload the specified WAV file to the MOH.
  @param musicFile The musicFile file for uploading to MOH. (required)
  @return SendMOHFilesResponse
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body