New Input System: Event on input type changed (between mouse, keyboard and controller)

I'm trying out the new input system - looks great!

In my game, I want the player to be able to switch between using mouse or keyboard or controller seamlessly. In order for this to work I need an event whenever the user starts using a different input device. So if the user is using the keyboard and touches the mouse, I want an event triggered, that tells me, that the input has changed to mouse-input.

Is there any easy or built-in way to do this? Or do I have to make a script that monitors every type of input in every frame and sent out those events?