json_schema: {
      "additionalProperties": false,
      "description": "A search GTM server-side event.",
      "properties": {
          "search_term": {
              "description": "The term that was searched for.",
              "maxLength": 4096,
              "type": "string"
          }
      },
      "required": [
          "search_term"
      ],
      "self": {
          "format": "jsonschema",
          "name": "search",
          "vendor": "com.google.tag-manager.server-side",
          "version": "1-0-0"
      },
      "type": "object"
  }