Update Marketing Cloud All Subscribers using SSJS

Update Marketing Cloud All Subscribers using SSJS.js

<script runat="server">    
Platform.Load("core", "1.1.1");

var subscriber = {
 SubscriberKey: "S_10001",
 "Attributes": {
  'First Name': "Karmab",
  "Last Name": "Dorjeeb"
 },
"Lists": {"ID": 101}
};
  
try {
 var subObj = Subscriber.Init("SubKey");
 var status = subObj.Update(subscriber);
 Write("Response: " + Stringify(status));
} catch (ex) {
 Write("catch: " + Stringify(ex));
}
</script>