iOS/Sources/WatchApp/Assets.xcassets/WatchIcon.appiconset/Contents.json

{
  "images" : [
    {
      "filename" : "Apple_Watch_App_Icon.png",
      "idiom" : "universal",
      "platform" : "watchos",
      "size" : "1024x1024"
    }
  ],
  "info" : {
    "author" : "xcode",
    "version" : 1
  }
}