As documented in
https://docs.google.com/document/d/1VWmlSanvvFZbtXD_pR4D1NE0kQ3MEwsCRkrXKwfVQGE/

This is a reference example for a Decentraland-compatible scene.
This is the sample scene in the documentation about how to convert a JanusVR Vesta scene for use in the Decentraland SDK.
You can find the documentation here:
"How to use JanusVR and Vesta to Create Decentraland Scenes"
https://docs.google.com/document/d/1JepgGnnKYh9Al_d9BLPHewYzUXmDslx-4OMJjEOGIEc

The converter is available in the POPOUT window's menu if you are at the UV Pro paid Vesta tier.

You are welcome to clone this scene, edit your copy to add your own content, then convert your scene for use in Decentraland.