Team Channel: Card with button. Specific URL for each user?

Gousia_Begum I read the link you mention and according to what I understood there I had the code I pasted before. Is it wrong?

I send to a channel a card, with an action button ("type": "Action.Submit"). When button pressed, my bot receives the HTTP post (message with type 'invoke'), and I responde with a 200 OK (with the task info)

But nothing happens (no popup task is open). Maybe I am not returning properly the Task:

var task = {
        "task": {
              type: 'continue',
                value: {
                      width: 500,
                      height: 220,
                      title: "Test",
                      url: sUrlNotLogged,
                      fallbackUrl: sUrlNotLogged
                }
        }
}

res.writeHeader(200, { "Content-Type": "application/json" });
res.write(JSON.stringify(task));
res.end();

Or I missunderstood the documentation...

Thanks for your help