updateCenter.post(
{"connectionCheckUrl":"http://www.google.com/", // has to be here because updateDirectly sniffs only very limited formats
    "core": {
        "buildDate": "Dec 31, 1969",
        "name": "core",
        "url": "jenkins.war",
        "version": "23"
    },
    "id": "default",
    "plugins": {
        "htmlpublisher": {
            "buildDate": "Dec 17, 2008",
            "dependencies": [],
            "developers": [
                {
                    "developerId": "mcrooney",
                    "name": "Michael Rooney"
                }
            ],
            "excerpt": "This plugin publishes HTML reports.",
            "name": "htmlpublisher",
            "wiki": "https://plugins.jenkins.io/htmlpublisher",
            "requiredCore": "1.398",
            "sha1": "tVSI0DVK02k9R3KV1M3A451Da3c=",
            "title": "HTML Publisher",
            "url": "htmlpublisher.jpi",
            "version": "0.7"
        },
        "dummy": {
            "buildDate": "Dec 17, 2008",
            "dependencies": [],
            "developers": [],
            "excerpt": "…",
            "name": "dummy",
            "wiki": "https://plugins.jenkins.io/dummy",
            "requiredCore": "1.100",
            "sha1": "wtzlcjUKiMcg90H5CTYkGX6+r8Y=",
            "title": "Dummy",
            "url": "http://nowhere.net/dummy.hpi",
            "version": "1.0"
        }
    },
    "updateCenterVersion": 1
}
);