function postComplex() {
  // to show that stringifying real dates does work as well
  var date = new Date();
  var events = {
    name: "Olli",
    events: [
      {
        title: "Strategy Meeting",
        startTime: "Fri Feb 01 10:00:00 CET 2013",
        endTime: "Fri Feb 01 11:30:00 CET 2013",
        description: "Discussion of the floreysoft strategy",
        location: "Telemannstraße 22, 20255 Hamburg"
      }, {
        title: "Dinner",
        startTime: "Fri Feb 01 20:00:00 CET 2013",
        endTime: date,
        description: "Dinner with Le Chef",
        location: "Gaußstraße 3, 22765 Hamburg"
      }
    ]
  };
 
   var options = {
     contentType: "application/json",
     method : "post",
     payload : Utilities.jsonStringify(events)
  };
  
  var response = UrlFetchApp.fetch('http://www.ultradox.com/ultradoc/execute?id=kNjCQaAALBCCtRH7gSJvasHF5fqJIW&action=DOWNLOAD&locale=DE',options)
  var blob = response.getBlob();
  var code = response.getResponseCode();
  Logger.log(code === 200 ? "Success" : "Error Code: " + code); 

  // sending out email just for demo purposes
  // in real applications send out personalized emails using Ultradox instead
  GmailApp.sendEmail("[your email goes here to send this to yourself]", "Your generated document", "See attachment", 
                     { attachments: [
                       {fileName: blob.getName(), mimeType: "application/pdf", content: blob.getBytes()}
                     ]
                     }); 
}