How to add samples in Asset Store?

I cannot add an instance to my asset in the Asset Store. I looked at the documentation but couldn't succeed. Where am I making a mistake?

MyPackage
  ├── package.json
  └── Samples~
        ├── StarterAssets

package.json

{
    "samples": [
        {
            "displayName": "StarterAssets Example Scenes",
            "description": "Contains demo scenes with StarterAssets.",
            "path": "Samples~/StarterAssets"
        }
    ]
}

I solved the problem. When I moved the project from the Plugins folder to the Packages folder, samples started to appear.