{
  "type": "object",
  "properties": {
    "id": {
      "type": "string"
    },
    "contextKey": {
      "type": "string"
    },
    "threadId": {
      "type": "string"
    },
    "commentId": {
      "type": "string"
    },
    "mentionHandle": {
      "type": "string"
    },
    "createdAt": {
      "type": "string",
      "format": "date-time"
    },
    "readAt": {
      "type": [
        "string",
        "null"
      ],
      "format": "date-time"
    }
  },
  "additionalProperties": true
}