Enable/Disable Full Body Tracking & Change Fidelity via script?

I'm looking for a way to turn on and off body tracking and change the fidelity via script.  Right now I don't see any method using the OVRManager that let's me interact with these.  I would like the user to be able to turn these on and off depending on the situation (don't want the full body processing to be wasted when they don't need it).

Thanks.