json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "array",
      "items": {
          "type": "object",
          "properties": {
              "id": {
                  "type": "number"
              },
              "name": {
                  "type": "string"
              },
              "requirement": {
                  "type": "string"
              },
              "order": {
                  "type": "number"
              },
              "background": {
                  "type": "string"
              },
              "region": {
                  "type": "string"
              },
              "levels": {
                  "type": "array",
                  "items": {
                      "type": "object",
                      "properties": {
                          "name": {
                              "type": "string"
                          },
                          "description": {
                              "type": "string"
                          },
                          "instruction": {
                              "type": "string"
                          },
                          "icon": {
                              "type": "string"
                          },
                          "point_cost": {
                              "type": "number"
                          },
                          "exp_cost": {
                              "type": "number"
                          }
                      },
                      "required": [
                          "name",
                          "description",
                          "instruction",
                          "icon",
                          "point_cost",
                          "exp_cost"
                      ]
                  }
              }
          },
          "required": [
              "id",
              "name",
              "requirement",
              "order",
              "background",
              "region",
              "levels"
          ]
      },
      "properties": {},
      "additionalProperties": false
  }