google chrome 复制下来的 fetch 看不懂

之前也没注意看，这次发现复制下来的 fetch 请求body里面带有后斜杠\, 这个写法没见过，请问各位老哥，这是什么？如果我把它放到postman里去，是否要换成正常的 json 格式？

fetch("https://example.com/api/something", {
  "headers": {
    "accept": "application/json, text/plain, */*",
    "content-type": "application/json",
    "sec-fetch-dest": "empty",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-origin"
  },
  "body": "{\"key1\":\"value1\",\"key2\":\"value2\"}",
  "method": "POST",
  "mode": "cors",
  "credentials": "include"
});