json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "type": {
              "type": "string",
              "enum": [
                  "timer"
              ]
          },
          "outputIds": {
              "type": "array",
              "items": {
                  "type": "array",
                  "items": {
                      "type": "string"
                  }
              }
          },
          "meta": {
              "type": "object"
          },
          "config": {
              "type": "object",
              "properties": {
                  "cron": {
                      "type": "string"
                  }
              },
              "required": [
                  "cron"
              ],
              "additionalProperties": false
          }
      },
      "required": [
          "type",
          "config"
      ],
      "additionalProperties": false
  }