{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "user_id": {
      "type": "string",
      "description": "user id recorded for this result."
    },
    "removed": {
      "type": "boolean",
      "const": true,
      "description": "removed recorded for this result."
    }
  },
  "required": [
    "user_id",
    "removed"
  ],
  "additionalProperties": {}
}