{
  "title": "thumbnail",
  "type": "object",
  "$schema": "http://json-schema.org/draft-04/schema",
  "description": "Object containing a thumbnail image.",
  "properties": {
    "url": {
      "type": "string",
      "description": "The URI pointing to the thumbnail image. Can be a URL or a base64-encoded image."
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false,
  "esriDocumentation": {
    "examples": [
      {
        "title": "url",
        "code": {
          "thumbnail": {
            "url": "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAA..."
          }
        }
      }
    ]
  }
}