json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "h": {
              "title": "Height",
              "description": "Image Height",
              "type": "number"
          },
          "w": {
              "title": "Width",
              "description": "Image Width",
              "type": "number"
          },
          "id": {
              "title": "ID",
              "description": "Image ID",
              "type": "string"
          },
          "p": {
              "title": "Image name",
              "description": "Image name",
              "type": "string"
          },
          "u": {
              "title": "Image path",
              "description": "Image path",
              "type": "string"
          }
      }
  }