Getting backslashes in JSON node in ResponseBody

So I am sending a POST request to ASMX web services, and in the response body JSON nodes have backslashes "\" is there way to parse it into standard json response?

HTTP/1.1 200 OK
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
Cache-Control: private, max-age=0
Content-Type: application/json; charset=utf-8
Date: Tue, 13 Feb 2018 21:49:17 GMT
Connection: Keep-Alive
Content-Length: 740

"{\"cid\":1,\"model\":\"WT50JB\",\"detail\":\"sdf??\",\"unit\":2,\"time_in\":\"2012-12-11T19:00:00\",\"time_out\":\"2012-12-12T13:00:06.2774691+07:00\",\"time_used_dd\":0.0,\"time_used_hh\":0.0}"