You're using “ instead of " for many of your strings. Those may not look like different double-quote characters, but they are. Only the latter is valid in JSON.

This usually happens to me when pasting quotation marks from another program, especially office software that likes to make its quotes look as fancy as possible.

The corrected JSON would be:

{
    "uuid": "13371337-d579-4d75-a5c5-8dfcfe110f62",
    "shortName": "Simple",
    "longName": "Simple",
    "companyName": "pjtnt11",
    "versionCode": 1,
    "versionLabel": "1.7",
    "watchapp": {
        "watchface": true
    },
    "appKeys": {
        "dummy": 0
    },
    "resources": {
        "media": [

        ]
    }
}