use sipgate Rest API to post a voicemail greeting

[BnnBonnie]

Hey there,

I've been trying to post a voicemail greeting using the sipgate Rest API. The request is sent to https://api.sipgate.com/v2/{userId}/phonelines/{phonelineId}/voicemails/{voicemailId}/greetings .

Unfortunately the server returns a 500 error (Internal Server Error). Does anybody know this problem? Could it be a problem on the server-side of sipgate? Cause other POST/GET requests work fine, just this one has some issue.. I couldn't find anything online about uploading voicemail greetings with sipgate Rest API, so any help is very much appreciated!