In init command:
Currently we send name property to indicate the bucket name, and this implicitly subscribes you to all of a buckets changes, name: "note" => send all changes in note bucket
Perhaps:
name: "note.abcd" => send only changes for object abcd in note
Or, a separate field:
query: "abcd" => send only changes for object abcd ( bucket from name: "note" still )
Not sure if we want to support more complicated queries yet