src/test/resources/initial-content/SLING-7268.json

{
    "jcr:primaryType" : "sling:Folder",
    "security:principals": [
        { 
            "name": "sling7268_user", 
            "password": "mypassword"
        },
        { 
            "name": "sling7268_group", 
            "isgroup": true,
            "members":[
               "sling7268_user"
            ]
        }
    ],
    "security:acl": [
        { 
            "principal": "everyone", 
            "granted": [
                "jcr:read"
            ]
        },
        { 
            "principal": "sling7268_user", 
            "granted": [
                "jcr:read",
                "jcr:write"
            ]
        },
        { 
            "principal": "sling7268_group", 
            "granted": [
                "jcr:modifyAccessControl"
            ]
        }
    ]
}