router.put('/:activityId', function (req, res) {
        var username = req.headers['x-gleaner-user'];
        restUtils.processResponse(activities.isAuthorizedFor(req.params.activityId, username, 'put', '/activities/:activityId')
            .then(function (activity) {
                return activities.modifyActivity(req.params.activityId, req.body, true);