imageURL-createAsset.js

var createAsset = HTTP.Post(requestUrl, contentType, Stringify(jsonBody), headerNames, headerValues);
//stringify response
var respo = createAsset.Response.toString();
//parse JSON
var res = Platform.Function.ParseJSON(respo);
//get the image url
var imgURL = res.fileProperties.publishedURL;
//initiate your data extension      
var myDE = DataExtension.Init("{{external key of the data extension}}");
//add a new row with url to a data extensions 
myDE.Rows.Add({ URLcolumn: imgURL });