DESK Webhook ist not sending any data to my URL (PHP)

DESK Webhook ist not sending any data to my URL (PHP)

Hi,

I have set up a webhook that is triggered when a new ticket is created in DESK.

I can see that my URL beeing called but there is no data / POST.

According to the documentation
https://desk.zoho.com/support/WebhookDocument.do#EventsSupported

There should be 4 paramteres one of which is named "payload" containing the data in JSON format.
But there isnt. I tried the ticket add process and also the "Test Run" button which should send a sample payload.

I tried everything in PHP to catch the data. $_POST, $_REQUEST even $_GET and much more.

Is there some sample code anywhere how to fetch this "POST" data? 

Best
Lukas