{
  "id": "1.7.10", "mainClass": "net.minecraft.client.main.Main",
  "minecraftArguments": "--username ${auth_player_name}  --session ${auth_session} --gameDir ${game_directory}",
  "assets": "1.7.10",
  "libraries": [
    {"name": "org.lwjgl.lwjgl:lwjgl-platform:2.9.1",
     "natives": {"linux": "natives-linux", "windows": "natives-windows-${arch}", "osx": "natives-osx"},
     "extract": {"exclude": ["META-INF/"]},
     "downloads": {"classifiers": {
        "natives-linux": {"path": "lw/natives-linux.jar", "url": "https://l/nl.jar", "sha1": "1", "size": 1},
        "natives-windows-64": {"path": "lw/natives-windows-64.jar", "url": "https://l/nw.jar", "sha1": "2", "size": 2},
        "natives-windows-32": {"path": "lw/natives-windows-32.jar", "url": "https://l/nw32.jar", "sha1": "3", "size": 3},
        "natives-osx": {"path": "lw/natives-osx.jar", "url": "https://l/no.jar", "sha1": "4", "size": 4}}}},
    {"name": "net.minecraft:launchwrapper:1.12", "url": "https://libraries.example/maven"}
  ]
}