This is your personal outbox. It's basically a list of the activities you've published. It roughly corresponds to the list of toots you see on people's profile page on Mastodon.

{
    "@context": "https://www.w3.org/ns/activitystreams",
    "to": [
        "https://dev.angeley.es/s/fr33domlover/p/vervis",
        "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/participants",
        "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/team"
    ],
    "actor": "https://dev.angeley.es/s/ak",
    "https://forgefed.angeley.es/ns#nonActors": [
        "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/participants",
        "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/team"
    ],
    "object": {
        "context": "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2",
        "published": "2019-05-25T22:16:02.43608719Z",
        "to": [
            "https://dev.angeley.es/s/fr33domlover/p/vervis",
            "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/participants",
            "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/team"
        ],
        "content": "This is fr33, commenting to test notifications.",
        "https://forgefed.angeley.es/ns#nonActors": [
            "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/participants",
            "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2/team"
        ],
        "id": "https://dev.angeley.es/s/ak/m/rwVmE",
        "type": "Note",
        "attributedTo": "https://dev.angeley.es/s/ak",
        "inReplyTo": "https://dev.angeley.es/s/fr33domlover/p/vervis/t/2"
    },
    "id": "https://dev.angeley.es/s/ak/outbox/rnBxr",
    "type": "Create"
}