Example code how to properly implement 'back' button and integration with Oculus Home in Unity

I have searched and tried and struggled and failed :) Is there some example code for Unity that shows how to properly integrate with Oculus home and the Universal Menu - I find lots of posts for Gear VR, but looking for how to do this with the Rift. 

Basically how to pause and get the universal menu, how to quit properly and how to recenter when selected.
Some code just putting a cube in the middle but having these interactions and pausing/quitting done right would be super helpful.

Thank you so much,
Thomas