json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "additionalProperties": false,
      "properties": {
          "title": {
              "description": "News title : used only for notification system",
              "type": "string"
          },
          "comment": {
              "type": "string"
          },
          "info_id": {
              "type": "integer"
          }
      },
      "required": [
          "info_id",
          "comment"
      ]
  }