ilgun -> As far as I could grasp when I was working on MGNLBACKUP-105, the behaviour is as follows;

• Command itself it returning false ->{ Success : true }
• Command returning true -> no effect I'd expect to have success : false but no it will still return{ Success : true }
• Command throwing exceptions -> Finally we get a { Success : false } with exception message in the response entity.

Therefore the success message relies on the command throwing exceptions or not.