Unravel JSON expression

Question

I have this JSON expression

{
  "uid":false,
  "token":null,
  "ma":null,
  "question":[
    {
      "questionId":47599,
      "answerId":190054,
      "answer":1
    }
  ],
  "iframe":true,
  "ref":"<SOMEREFERRER>",
  "ts":1711214476
}

that a webclient (in this case, Google Chrome and Firefox on iOS) wants to send to a webserver. It is a reply on a survey form another server (SOMEREFERRER) has sent. I am rather unfamiliar with JSON and wondering what this string is exactly doing when posted to the target server.

I have found that the survey server is accepting this string multiple times and counts it as a "vote". This is not supposed to happen.