{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Sally listened to a piece of music on the Acme Music Service",
"type": "Listen",
"actor": {
"type": "Person",
"name": "Sally"
},
"object": "http://example.org/foo.mp3",
"instrument": {
"type": "Service",
"name": "Acme Music Service"
}
}