Kind `10013` indicates the user's preferred relays to store private events like Drafts. The event MUST include a list of `relay` URLs in private tags. Private tags are JSON Stringified, NIP-44-encrypted to the signer's keys and placed inside the .content of the event.
```js
{
"kind": 10013,
"tags": [],
"content": nip44Encrypt(JSON.stringify([
["relay", "wss://myrelay.mydomain.com"]
]))
//...other fields
}
```
Relays listed in this event SHOULD be authed and only allow downloads to events signed by the authed user.
Clients SHOULD publish kind `10013` events to the author's [NIP-65](65.md) `write` relays.