json_schema: {
      "additionalProperties": false,
      "description": "Schema for a Google Analytics event hit",
      "properties": {
          "action": {
              "maxLength": 500,
              "type": "string"
          },
          "category": {
              "maxLength": 150,
              "type": "string"
          },
          "label": {
              "maxLength": 500,
              "type": [
                  "string",
                  "null"
              ]
          },
          "value": {
              "minimum": 0,
              "type": [
                  "integer",
                  "null"
              ]
          }
      },
      "required": [
          "category",
          "action"
      ],
      "self": {
          "format": "jsonschema",
          "name": "event",
          "vendor": "com.google.analytics.measurement-protocol",
          "version": "1-0-0"
      },
      "type": "object"
  }