json_schema: {
      "additionalProperties": false,
      "description": "Transport the value of an input",
      "minProperties": 1,
      "properties": {
          "v": {
              "description": "value as integer",
              "type": "integer"
          }
      },
      "required": [
          "v"
      ],
      "title": "Single value schema",
      "type": "object"
  }