Is it possible to link a shape key animation to only one of my actions? I have several actions(animations) for my character rig and in one of the animations I wanted to use a shape key to animate only part of the mesh.

I did complete the shape key animation but it shows up in all of my actions.

My question:
Is it possible to link a shape key animation to only one of my actions? 

This will be exported as a character into Unity.
Whilst trying to solve my problem I realized that there was a better way to do this and by using a driver bone to animate the shape key I could keep the shape key animation linked to only one of my actions.

If anyone else is had this same problem I would recommend looking up key shape drivers. It will save you a headache.