@scott i don't think "how to send" is important. i think it's more important to focus on "ok i got the message but what does it mean"

like is there any difference between

```
{"type": "Create", "to": "host.example/some-resource", "object": {"content": "hi"}}
```

vs

```
POST /some-resource HTTP/1.1
Host: host.example

hi
```

semantically, you are saying "hi" in both cases. the only difference is parsing rules.