code: @RequestMapping(value = "builds/{buildId}/signature", method = RequestMethod.PUT)
      public Build updateBuildSignature(@PathVariable ID buildId, @RequestBody SignatureRequest request) {
          // Gets from the repository
          Build build = structureService.getBuild(buildId);
          // Updates
          build = build.withSignature(
                  request.getSignature(build.getSignature())
          );
          // Saves in repository
          structureService.saveBuild(build);
          // As resource
          return build;
      }
docs: Update the build signature