{
  "type": "object",
  "required": [
    "id",
    "revisionId",
    "actor",
    "body",
    "createdAt"
  ],
  "additionalProperties": true,
  "properties": {
    "id": {
      "type": "string"
    },
    "revisionId": {
      "type": "string"
    },
    "actor": {
      "type": "object"
    },
    "body": {
      "type": [
        "string",
        "null"
      ]
    },
    "createdAt": {
      "type": "string",
      "format": "date-time"
    },
    "messageVersion": {
      "type": "integer",
      "minimum": 1
    },
    "editedAt": {
      "type": [
        "string",
        "null"
      ],
      "format": "date-time"
    },
    "editable": {
      "type": "boolean",
      "description": "Human conversational eligibility; never grants bearer edit authority."
    }
  }
}