| `activitypub.activity.id` | string | The URI of the activity object. | `"https://example.com/activity/1"` |
| `activitypub.activity.type` | string[] | The qualified URI(s) of the activity type(s). | `["https://www.w3.org/ns/activitystreams#Create"]` |
| `activitypub.activity.to` | string[] | The URI(s) of the recipient collections/actors of the activity. | `["https://example.com/1/followers/2"]` |
| `activitypub.activity.cc` | string[] | The URI(s) of the carbon-copied recipient collections/actors of the activity. | `["https://www.w3.org/ns/activitystreams#Public"]` |
| `activitypub.activity.resend_count` | int | The ordinal number of activity resending attempt (if and only if it's retried). | `3` |
| `activitypub.activity.retries` | int | The ordinal number of activity resending attempt (if and only if it's retried). | `3` |
| `activitypub.actor.id` | string | The URI of the actor object. | `"https://example.com/actor/1"` |
| `activitypub.actor.type` | string[] | The qualified URI(s) of the actor type(s). | `["https://www.w3.org/ns/activitystreams#Person"]` |
| `activitypub.object.id` | string | The URI of the object or the object enclosed by the activity. | `"https://example.com/object/1"` |
| `activitypub.object.type` | string[] | The qualified URI(s) of the object type(s). | `["https://www.w3.org/ns/activitystreams#Note"]` |
| `activitypub.object.in_reply_to` | string[] | The URI(s) of the original object to which the object reply. | `["https://example.com/object/1"]` |
| `activitypub.inboxes` | int | The number of inboxes the activity is sent to. | `12` |
| `activitypub.shared_inbox` | boolean | Whether the activity is sent to the shared inbox. | `true` |
