@RequestMapping(value = "/event-branch-speaker-list/{eventBranchId}", method = RequestMethod.GET)
    @ResponseBody
    public SpeakerListResponse eventBranchSpeakerList(
            @PathVariable(value = "eventBranchId") final String eventBranchIdStr
    ) {
        Boolean success = true;
        String errorMessage = null;
        List<Speaker> speakerList = null;

        Long eventBranchId = null;
        try {
            eventBranchId = controllerUtils.convertStringToLong(eventBranchIdStr, true);
            speakerList = speakerPresenter.findSpeakersByEventBranchId(eventBranchId);
        } catch (UrlParameterException e) {
            success = false;
            errorMessage = "Event branch ID is wrong or empty";
        }

        return new SpeakerListResponse(success, errorMessage, speakerList);
    }