Howto extract multipart audio from json response and resend it

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Hello All,
I’m facing a problem, here it is
I have a server , wiremock (for callback) and postman.
My server send to wiremock an audio file, with postman I check this request and I want to verify the audio file by resending this audio to another server.
with postman I do
POST {{WIREMOCK_URL}}/__admin/requests/find
Body
{
“method”:“POST”,
“urlPathPattern”: “/incoming_prompt”
}
and the response contains:
A json like this

{
  "requests" : [ {
    "url" : /incoming_prompt",
    "absoluteUrl": "...",
    "method" : "POST",
    ...
   "headers" :{
    ...
   "Content-Type" : "multipart/form-data;boundary=cbrrYFpJeVLnZJdkwuvvW93PJgVWEfzgUKSYu;charset=UTF-8"
   },
  ...
  "bodyAsBase64": ".....",
  "body": ""body" : "--cbrrYFpJeVLnZJdkwuvvW93PJgVWEfzgUKSYu\r\nContent-Disposition: form-data; name=\"recordFile\"; filename=\"VXI00009d42O0ybpO\"\r\nContent-Type: audio/x-wav\r\nContent-Length: 11450\r\n\r\nRIFF�,\u0000\u0000WAVEfmt .....",
....
}

So in body I have the audio file in multipart

I want to make another put request to resend this file
How can I do that please?

I’ve already tried:
I tried what I see here in postman example
In tests part

var jsonData = pm.response.json();
var body = jsonData.requests[0].body;

setTimeout(() => {
         pm.sendRequest({
        url: 'https://wiremock/__admin/files/recorded.wav',
        method: 'PUT',
        header: 'Content-Type:audio/x-wav',
        encoding: 'binary',
        body: {
            mode: 'form-data',
            raw: body
        }
    }, function (err, res) {
        console.log(res);
    });
}, 5000);
doesn't work

Or may be I have to write as a file before to resend it something like (does not work)

var jsonData = pm.response.json();
var myBody = jsonData.requests[0].body;
let opts = {
    requestName: request.name || request.url,
    fileExtension: 'wave',
    mode: 'writeFile', // Change this to any function of the fs library of node to use it.
    uniqueIdentifier: 'waddup',
    responseData: myBody,
    options: {
        encoding: 'binary'
    }
};

setTimeout(() => {
    pm.sendRequest({
        url: 'https://wiremock/__admin/files/recorded.wav'',
        method: 'PUT',
        header: 'Content-Type:audio/wav',
        encoding: 'binary',
        body: {
            mode: 'raw',
            raw: myBody
        }
    }, function (err, res) {
        console.log(res);
    });
}, 5000);

Thanks very much for your help

Jean