Web Remote Control Get Material Graph?

I’m using web remote control to get all textures used in my game。

For example,I have a physical material called test.

Now I can get the properties of a texture sample node by this method,the texture path can read from the result:

PUT http://localhost:8080/remote/object/property
    "objectPath" :"/Game/Test/Meshes/Sky/Materials/test.test:MaterialExpressionTextureSample_0",

But I can’t know how many texture sample nodes in this material,and whitch property of test material they linked.

I try to get the material’s properties but can’t find that message.

Any one know that,please help me!

Thanks for all replys.