json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "additionalProperties": false,
      "description": "get spiders response",
      "properties": {
          "links": {
              "properties": {
                  "self": {
                      "properties": {
                          "href": {
                              "_format": "uri",
                              "type": "string"
                          }
                      },
                      "required": [
                          "href"
                      ],
                      "type": "object"
                  }
              },
              "required": [
                  "self"
              ],
              "type": "object"
          },
          "spiders": {
              "additionalProperties": true,
              "properties": {},
              "type": "object"
          }
      },
      "required": [
          "spiders",
          "links"
      ],
      "title": "get spiders response",
      "type": "object"
  }