I’m processing the Activity Log event stream, and have run into an undocumented entity type called billing_group. It is not listed in the Activity Logs Types.

{

  "id": "123456",

  "timestamp": 1234567,

  "actor": {

    "type": "user",

    "id": "9876543",

    "name": "Example User",

    "email": "user@example.com"

  },

  "action": {

    "type": "license_group_admins_add",

    "details": {

      "new_admin_emails": :

        "admin@example.com"

      ]

    }

  },

  "entity": {

    "type": "billing_group",

    "id": "12345",

    "name": "Fictitious Client Name"

  },

  "context": {

    "team_id": null,

    "org_id": "123456789",

    "ip_address": "127.0.0.1",

    "is_figma_support_team_action": false,

    "client_name": null

  }

}