App\Http\Controllers\IntegrationController::subscribe PHP Method

    public function subscribe()
    {
        $eventId = Utils::lookupEventId(trim(Input::get('event')));
        if (!$eventId) {
            return Response::json('Event is invalid', 500);
        }
        $subscription = Subscription::where('account_id', '=', Auth::user()->account_id)->where('event_id', '=', $eventId)->first();
        if (!$subscription) {
            $subscription = new Subscription();
            $subscription->account_id = Auth::user()->account_id;
            $subscription->event_id = $eventId;
        }
        $subscription->target_url = trim(Input::get('target_url'));
        $subscription->save();
        if (!$subscription->id) {
            return Response::json('Failed to create subscription', 500);
        }
        return Response::json('{"id":' . $subscription->id . '}', 201);
    }