Is there a canonical/RESTful way to send query details to a server during a GET?

I’m designing a (more or less) RESTful internal web service running on ASP.NET and IIS. I want clients to be able to pass query details to the server when accessing large collections of entries, using JSON to describe the query in a known manner. The issue is that the queries sent to the server will be complex; they may include aggregation, filtering, mapping—essentially anything that is supported by the LINQ query operators. This will result in relatively large JSON objects representing the queries.