A person's device, for the :push channel:
:kind-"web"(a browser's Web Push subscription),"apns"(an iPhone's or a Mac's token) or"fcm"(an Android phone's token, or any app's of Firebase);:token- the subscription's endpoint, or the token;:keys- a Web Push subscription's"p256dh"and"auth";:name- what the person calls it ("Ana's iPhone"), or nil;:enabled- whether it gets notifications: a person turns a device off and on, and keeps it;:last_used_at- when a push last went to it.
A device a service says is gone (an unsubscribed browser, an app removed) is deleted, and the log says so.