ServerCommandService.svc Login Soap API not working

Hi I have been using /ServerAPI/ServerCommandService.asmx SOAP API for login with NTLM headers for windows authentication and could able to get the token from postman.But as ServerCommandService.asmx is deprecated and recommended to use /ManagementServer/ServerCommandService.svc API , I am unable to get the token ,instead i am getting 415 status code or bad request.Can anyone share me exact request details to debug whether i am missing something.

The TCPVideoViewer (or Login) sample and underlying ServerCommandWrapper uses this. This is not postman but I wonder if you can still get information from this.

https://doc.developer.milestonesys.com/html/index.html?base=samples/tcpviewer_sample.html&tree=tree_3.html

https://doc.developer.milestonesys.com/html/index.html?base=samples/logindotnetsoap.html&tree=tree_3.html

@Girish Dasari​ Just come across your question as I have the same issue with Postman to prove the API. Is there any update on your question?