json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "required": [
          "toEmail"
      ],
      "properties": {
          "toEmail": {
              "type": "array",
              "min": 1,
              "max": 10,
              "items": {
                  "type": "string",
                  "format": "email",
                  "maxLength": 1024
              }
          },
          "subject": {
              "type": "string",
              "max": 255
          },
          "message": {
              "type": "string",
              "max": 32767
          },
          "theme": {
              "type": "string",
              "enum": [
                  "dark",
                  "light"
              ]
          },
          "time": {
              "type": "number"
          },
          "timezone": {
              "type": "string",
              "max": 255
          }
      },
      "additionalProperties": false
  }