You’ve tried to add metadata as a tag.
Please try this:
- In Paper UI, make sure that the Addon Misc → REST Documentation is installed.
- Open the REST Documentation: http://…:8080/doc/index.html
- Open items, PUT /items/{itemname}/tags/{tag}
- Enter the name of the item and then the tag and press “Try it out”
where {tag} is: Switchable
Your “item” in rest api should result like this:
"tags": [
"Switchable"
],