@PUT("v1/audio/{agendaRootUid}/spoken_language/{spokenLanguage}")
    Completable
    putAgendaSpeechRecognition(@Path("agendaRootUid") String agendaId, @Path("spokenLanguage") String languageCountryCode);

public Completable putAgendaSpeechRecognitionLanguage(String agendaId, String languageCountryCode) {
        return mAppApi.putAgendaSpeechRecognition(agendaId, languageCountryCode)
                .subscribeOn(Schedulers.io());
    }

public void putAgendaLanguage(String agendaId, String language, String oldLanguage) {
        mRepository.putAgendaSpeechRecognitionLanguage(agendaId, language)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new CompletableObserver() {
                    @Override
                    public void onSubscribe(Disposable d) {

                    }

                    @Override
                    public void onComplete() {
                        if (mSingleMeetingView != null) {
                            mSingleMeetingView.onPutAgendaSpeechRecognitionLanguageSuccessfully(language);
                        }
                    }

                    @Override
                    public void onError(Throwable e) {
                        if (mSingleMeetingView != null) {
                            mSingleMeetingView.onPutAgendaSpeechRecognitionLanguageFailed(oldLanguage);
                        }
                    }
                });
    }