I'll make a small assumption about your scene: that it is a customize your avatar kind of thing with lots of sliders changing individual blendshapes in realtime.
have a look at the UI sliders, they translate from 0 to 1. You need a playmaker action that will GET the UI slider value, save the value as a float variable, then SET the associated blendshape that that value on the model.
Probably each slider and blendshape action are updating every frame, then you'll have a button that saves the avatar settings (maybe as an array saved to PlayerPref), and when you go back to your game scene, the figure will read the array to set it's blendshapes.
