{
  "1": {"class_type": "LoadImage", "_meta": {"title": "Source image"}, "inputs": {"image": "example.png"}},
  "2": {"class_type": "UpscaleModelLoader", "inputs": {"model_name": "RealESRGAN_x4plus.pth"}},
  "3": {"class_type": "ImageUpscaleWithModel", "inputs": {"upscale_model": ["2", 0], "image": ["1", 0]}},
  "4": {"class_type": "SaveImage", "inputs": {"filename_prefix": "appnz-upscale", "images": ["3", 0]}}
}