Just For Future reference
i was trying to do the same thing , and i was succesfull after several trials ,
Ensure you run on the apropriate Version of Rest module , that contains the change set @dkayiwa posted above.
NB , Also make sure in your request header , you dont set
Content-Type , PostMan will automatically set it for , other wise You’ll run into oanother error solved here
see Screenhot from my PostMAN
