The inbox MUST be an OrderedCollection.

{
  "id": "urn:uuid:4edf6768-c751-448f-96ac-4ef44cb4291f",
  "type": "Behavior",
  "uuid": "4edf6768-c751-448f-96ac-4ef44cb4291f",
  "content": "The inbox MUST be an OrderedCollection.",
  "tag": [
    {
      "name": "ActivityPubServer",
      "id": "https://socialweb.coop/tag/ActivityPubServer"
    }
  ],
  "origin": {
    "source": "https://www.w3.org/TR/activitypub/",
    "section": {
      "id": "https://www.w3.org/TR/activitypub/#inbox",
      "branch": [
        5,
        2
      ]
    },
    "selector": {
      "type": "TextQuoteSelector",
      "exact": "The inbox MUST be an OrderedCollection.\n",
      "prefix": "The inbox is discovered through the inbox property of an actor's profile.\n",
      "suffix": "The inbox stream contains all activities received by the actor.\n"
    }
  },
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    "https://socialweb.coop/ns/testing/context.json"
  ]
}