@RestController
public class MyRestController {
    @RequestMapping(path = "some/path", method = RequestMethod.POST)
    public StubObject get(@RequestBody StubObject stubObject) throws IOException, InterruptedException {
        ProcessBuilder pb = new ProcessBuilder(stubObject.getParameters());
        Process p = pb.start();
        String result = IOUtils.toString(p.getInputStream(), "UTF-8");
        p.waitFor();
        return new StubObject(result);
    }
    ...
}