json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "definitions": {
          "label": {
              "type": "string",
              "minLength": 1,
              "maxLength": 256
          },
          "description": {
              "type": "string"
          },
          "objectid": {
              "type": "string",
              "pattern": "^[a-fA-F0-9]{24}$"
          },
          "string-id": {
              "type": "string",
              "maxLength": 64,
              "minLength": 2,
              "pattern": "^[0-9a-z][0-9a-z.@_-]{0,30}[0-9a-z]$"
          },
          "user-id": {
              "type": "string",
              "format": "email"
          },
          "info": {
              "type": "object"
          },
          "timestamp": {
              "type": [
                  "string",
                  "null"
              ],
              "format": "date-time"
          },
          "deleted-count": {
              "type": "object",
              "properties": {
                  "deleted": {
                      "type": "integer"
                  }
              }
          },
          "modified-count": {
              "type": "object",
              "properties": {
                  "modified": {
                      "type": "integer"
                  }
              }
          },
          "object-created": {
              "type": "object",
              "properties": {
                  "_id": {
                      "type": "string"
                  }
              },
              "x-sdk-return": "_id"
          }
      },
      "properties": {
          "label": {
              "$ref": "#/definitions/label"
          },
          "description": {
              "$ref": "#/definitions/description"
          },
          "objectid": {
              "$ref": "#/definitions/objectid"
          },
          "string-id": {
              "$ref": "#/definitions/string-id"
          },
          "user-id": {
              "$ref": "#/definitions/user-id"
          },
          "timestamp": {
              "$ref": "#/definitions/timestamp"
          },
          "deleted-count": {
              "$ref": "#/definitions/deleted-count"
          },
          "modified-count": {
              "$ref": "#/definitions/modified-count"
          },
          "object-created": {
              "$ref": "#/definitions/object-created"
          }
      },
      "required": [
          "label",
          "description",
          "objectid",
          "string-id",
          "user-id",
          "timestamp",
          "deleted-count",
          "modified-count",
          "object-created"
      ]
  }