Laravel通知广播自定义数据

Question

I have this as broadcasting data:

public function toBroadcast($notifiable)
    {
        $avatar = !is_null($this->follower->avatar) ? 'storage/' . $this->follower->id . '/' . $this->follower->avatar->image : '' ;
        return new BroadcastMessage([
            'follower_id' => $this->follower->id,
            'avatar' => $avatar,
            'name' => $this->follower->name,
            'at' => Carbon::now()->format('d/m/Y')
        ]);
    }

It does work but I am getting additional type, uuid and socket within this array... How can I cut those and use just ones that I added?