{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "expectedRevision": {
      "type": "integer",
      "minimum": 1,
      "maximum": 9007199254740991,
      "description": "Revision last read by the caller; mismatches reject concurrent updates."
    }
  },
  "required": [
    "expectedRevision"
  ],
  "additionalProperties": false
}