How to set route paramters in API Action?

I’m trying to pass a route parameter value (e.g. uuid) into a URL as part of an API action.
http://localhost:8100/api/v1/contacts/:uuid

In Bubble I would do it by using brackets – this then provided a key value pair. I’m not sure if this can be accomplished in the API action in Wappler.

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Here is what I have in the API Action. I’ve tried looking at Dynamic Attributes and Query Parameters, but those do not appear to allow me to dyanmically change the route parameter.

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Is this possible or is an enhancement needed?