Currently it allows CLI to attempt to create override value without these params which result in 500.

[ INFO 2015-03-18 16:00:34 API] POST /api/smart_variables/205/override_values
[DEBUG 2015-03-18 16:00:34 API] Params: {
    "override_value" => {}
}
[DEBUG 2015-03-18 16:00:34 API] Headers: {}
[DEBUG 2015-03-18 16:00:35 API] 500 Internal Server Error
{
    "error" => {
        "message" => "undefined method `match' for nil:NilClass" 
    }
}