{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "$revision": {
      "type": "integer",
      "minimum": 1
    },
    "$updatedAt": {
      "type": "integer",
      "minimum": 0
    }
  },
  "required": [
    "$revision"
  ],
  "additionalProperties": false
}