I spent a while looking for a way to have something like params['update'] = { 'k1' => 'v1', ... } and params['remove'] = ['k3', 'k4', ...] but couldnt work out how to make it so on a 'GET' request.  I figured that this was the lesser of 2 evils with the other being a POST with json, but that would be extremely inconsistent with the other /svc apis and make for a more convoluted CURL command in the installers.