Using keyed members in the association file format is probably a better design choice

[LuHuangMSFT]

[
    {
        "manifest": "https://contoso.com/manifest.json",
        "handle_urls": {
            "paths": [
                "/*"
            ],
            "exclude_paths": [
                "/blog",
                "/about"
            ]
        }
    },
    {
        "manifest": "https://partnerapp.com/manifest.json",
        "handle_urls": {
            "paths": [
                "/public/data/*"
            ]
        }
    }
]

This format, as written, uses an array at the top level. After reviewing some design guidelines, I think this might hamper the ability to extend this format. It might be a good idea to use a key : value format wherever possible even if there is only one key right now.