How to pass a class instance to a service using putExtra

I have a class that uses a class instance of import io.flutter.plugin.common.MethodChannel but now i want to pass that class instance to a Service where i can call it, but i cant get around it.

I have tried using putExtra but i cant seem to find a way to get it from the service end.

For example:

Intent playIntent = new Intent(activity.getApplicationContext(), MusicPlayerService.class);
      playIntent.putExtra("activeAudioUrl", activeAudio);
      playIntent.putExtra("channelInstance", channel);
      activity.startService(playIntent);

Here is the service class from which i am trying to get the data:

public int onStartCommand(Intent intent, int flags, int startId) {
        String activeAudio = intent.getStringExtra("activeAudioUrl");
        MethodChannel methodChannel = intent.getParcelableExtra("channelInstance");


        ...
    }

from How to pass a class instance to a service using putExtra