The body argument for the apexRest call needs to be stringified before sending to _apiRequest. For backwards compatibility sake, we should check to see if the body argument is actually an object before stringifying it. All other POST methods should do the same check.
The body argument for the apexRest call needs to be stringified before sending to _apiRequest. For backwards compatibility sake, we should check to see if the body argument is actually an object before stringifying it. All other POST methods should do the same check.