json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "NewDemoModel",
      "required": [
          "Metadata"
      ],
      "type": "object",
      "properties": {
          "Metadata": {
              "required": [
                  "Masters",
                  "Minions",
                  "Provider",
                  "RAM",
                  "vcpu",
                  "Storage"
              ],
              "properties": {
                  "Masters": {
                      "properties": {
                          "Instance": {
                              "type": "string"
                          },
                          "size": {
                              "type": "integer"
                          }
                      },
                      "type": "object"
                  },
                  "Minions": {
                      "properties": {
                          "Instance": {
                              "type": "string"
                          },
                          "size": {
                              "type": "integer"
                          }
                      },
                      "type": "object"
                  },
                  "Provider": {
                      "type": "string"
                  },
                  "RAM": {
                      "type": "string"
                  },
                  "Storage": {
                      "type": "string"
                  },
                  "vcpu": {
                      "type": "integer"
                  }
              },
              "type": "object"
          }
      }
  }