How can I load a playlist of pictures by JSON-RPC API and run it?



Hi, I’m able to upload a picture, can I upload multiple pictures?
I’ve tried this this but I don’t see, maybe I’ve to add a command to start playing?

Code:
return {
    payload:
    {
        "method": "Playlist.Add",
        "args": {
            "item":
                [{
                    "file": "http://192.168.101.100/1.jpg"
                },
                { "file": "http://192.168.101.100/2.jpg"
                },
                {
                    "file": "http://192.168.101.100/3.jpg"
                }],
            "playlistid": 1
    }
       
}};