JSFiddle - React, Tailwind, and code Playground

JavaScript

var data = '[{"responseCode":"0"},[{"countryId":"1","countryName":"USA","isdCode":"","isActive":"\u0001"}]]'
data = data.replace("\u0001", "\\\\u0001")

try {
    var result = JSON.parse(data);
    console.log(result)
}catch(err) {
    console.log(err)
}