json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "CTA",
      "type": "object",
      "properties": {
          "name": {
              "type": "string",
              "readonly": true,
              "enum": [
                  "cta"
              ],
              "options": {
                  "hidden": true
              }
          },
          "template": {
              "type": "string",
              "options": {
                  "hidden": true
              }
          },
          "type": {
              "description": "Type of CTA",
              "type": "string",
              "enum": [
                  "primary",
                  "secondary",
                  "disabled"
              ]
          },
          "href": {
              "description": "Call to action URL",
              "type": "string",
              "format": "url"
          },
          "title": {
              "description": "Anchor tag title attribute",
              "type": "string"
          },
          "text": {
              "description": "Text in the call to action link",
              "type": "string"
          }
      },
      "required": [
          "name",
          "href",
          "text"
      ],
      "additionalProperties": false
  }