I was able to generate the token for the authentication and correctly perform all the GET operations (e.g. https://api.ws.sonos.com/control/api/v1/groups/{groupID}/groupVolume) but not POST operations.
All the posts return me a 500 Internal Server error without content.
I am trying to perform this requests with Postman. Already tried to google my problem but the solutions I found implements a different protocol with node.js.
Someone suggested to look for the requests made by the official application with wireshark but apparently it does communicate directly with the speaker (at its local IP address).
Does anyone has the same problem?
Best answer by controlav
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