{
  "$defs": {
    "SchemaRoot": {
      "type": "object",
      "properties": {
        "field": {
          "type": "object",
          "properties": {
            "self": {
              "$ref": "#/$defs/SchemaRoot"
            }
          },
          "default": {}
        }
      },
      "required": [
        "field"
      ]
    }
  },
  "$ref": "#/$defs/SchemaRoot"
}