----- Introduction -----
You can play After Effects animation on Unity with AEAsAnimation.
AEAsAnimation provides the way to convert the AfterEffects animation to the Json data for Unity.

AEAsAnimation Website

----- Features -----

Following features of After Effects are supported.

Transform
Opacity
Color overlay
Image file footage
Solid footage
Shape mask
Layer parent link
Expression

Also animation utilities are included in.

Layer click event
Start from marker
Loop between markers
Pause and resume
Preloading
Prefab Cache
Swap images