JSon to a Blueprint Pawn. I want to change the x, y, z scale of a cube with JSon

I want to change the x, y, z scale of a cube with JSon . could some one give a bit of assistance if possible.
Im not to sure what nods to use to interact with the cube

Im sure I have the Json code down
image

I want to edit this with the VaRest
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Hi,

This tutorial seems to explain using VaRest pretty well.

thank you was really helpful