e for parsing the .json file.
          let skeletonJson = new spine.SkeletonJson(atlasLoader);

          // Set the scale to apply during parsing, parse the file, and create a new skeleton.
          skeletonJson.scale = 0.4;
          let skeletonData = skeletonJson.readSkeletonData(
              assetManager.require(skeletonFile)
          );

          // Create a SkeletonMesh from the data and attach it to the scene
          skeletonMesh = new spine.SkeletonMesh({ skeletonData });
          skeleton