Laravel Echo not recognizing event

I have Laravel Echo set up successfully to listen to one event. However, when I tried to add an additional event to the same channel the first one was a part of, the client-side seemingly does not recognize this new event. However, looking at Laravel Horizon, I can see the jobs being registered and processed successfully. Any ideas on why this may be occurring?

Event:

namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Queue\SerializesModels;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;

class ParticipantCreated implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $data;
    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($data)
    {
        $this->$data = $data;
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return \Illuminate\Broadcasting\Channel|array
     */
    public function broadcastOn()
    {
        return new PrivateChannel('channelReceiveLiveData');
    }
}

Controller where event is being emitted:

<?php

namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Participant;
use App\Test;
use App\Events\ParticipantCreated;

class ParticipantController extends Controller
{

    public function create() {
        event(new ParticipantCreated('test'));
    }
}

VueJS component where Echo is setup:

    // This one works
    Echo.channel('channelReceiveLiveData')
    .listen('liveDataTrigger', (e) => {
        console.log('Received Live Event');
    })

    // This one does not work
    .listen('ParticipantCreated', (e) => {
        console.log('Received Participant Created');
    });

via Chebli Mohamed