Introduce a Replacement Path (Variable) in URL

Hi,

I have a InfoObject in a query without leaks or filters and variables. But now when I run the query in a URL, I want that the infoObject take a Replacement Path (kind of Variable). I don´t know if is posible modify the URL to get it.

I know that is posible to get this with a filter o leak, but with a variable I don´t know.

Thanks in advance