How to convert unicode text to readable text

I use UrlFetch to get web content in Google AppsScript.Problem is that the content I get is:Kurulu\u015f Osman - \u0627\u0644\u0645\u0624\u0633\u0633 \u0639\u062b\u0645\u0627\u0646

When I use Logger.log(content) I get:Kuruluş Osman - المؤسسعثمانThis is what I want to get when I do a POST UrlFetchApp.

When I POST the content with UrlFetchApp.fetch(content) I still get:Kurulu\u015f Osman - \u0627\u0644\u0645\u0624\u0633\u0633 \u0639\u062b\u0645\u0627\u0646

How to get the Logger.log(content) also being POST:ed with UrlFetchApp command?

Code:

var result = UrlFetchApp.fetch(urlA).getContentText(); // Gives, in Debug mode: Kurulu\u015f Osman - \u0627\u0644\u0645\u0624\u0633\u0633 \u0639\u062b\u0645\u0627\u0646Logger.log(result); // Gives: Kuruluş Osman - المؤسسعثمانvar payload = JSON.stringify({content: result});var params = {    method: "POST",    payload: payload,    muteHttpExceptions: true,    contentType: "application/json"};UrlFetchApp.fetch(urlB, params);

I get this at the receiving end: Kurulu\u015f Osman - \u0627\u0644\u0645\u0624\u0633\u0633 \u0639\u062b\u0645\u0627\u0646