delete ramcache entry for exact uri using iControlREST

As an addendum, sending a DELETE to https://big.ip/mgmt/tm/ltm/profile/ramcache/xxxxxx works, however I can't figure out the syntax to specify further options. A JSON body is not accepted with a DELETE request (returns 400). I also tried using the options query parameter (which the GET section of the iControl REST user guide says "Specifies the options to a query request. This parameter takes values that are compatible with the tmsh command-line options.") but that also returns 400. Is what I'm trying to do actually possible?