Reading Custom Attributes of Skeletal Mesh

Hi everyone;
I’ve a character with 2d textured eyes, and i animate them with texture coordinates on 3ds Max.
I write coordinate datas to custom attributes on my rig and export them as FBX to UE.

When i import my rig and animation, i can see custom attributes and curves in my animation asset.

i need to read this data and write to material coordinates.

How can i get it?

Best Regards.