HTTP-Post changed

At home I have a Warema WMS pro WMS WebControl pro - Ihr Zuhause immer dabei controller, to control my roller shutter.

The controller has a http interface to manage all the stuff (no auth, just http). For testing I captured a http connnection (wireshark) to see what http-post statements are needed to control one of the shutter.

Unfortunately there is no official API for this controller.

I also captured the http connection with postman, and try to run it again without the need of the controller´s webserver but without success. I captured the http-posts of postman and they´re different from the original one (see screenshots)

HTTP-post to the Webserver (Chrome):

Postman´s HTTP-post

So how can I manage to send an exact copy of the original packet?