title: Send Blob to server with Axios, receiving an empty object
body: <p>I am trying to send an audio as a Blob object in React with Typescript to the server with Axios. I have been trying many ways but I always get an emty object on the node server.</p>
  
  <p>As I have seen, now I have what it should be the correct way to do it. But still get an empty object.</p>
  
  <pre><code>const config = {
      headers: {
        'Content-Type': 'multipart/form-data; boundary=${data._boundary}'
      }
    };
  
    try {
      var formData: FormData = new FormData();
      formData.append('audio', audioBlob);
  
      const res = await axios.post('/api/recording', formData, config);
      console.log(res);
    } catch (err) {
      console.log(err.response.data.errors);
    }
  </code></pre>
  
  <p>If i do </p>
  
  <pre><code>'Content-Type': 'application/json'
  </code></pre>
  
  <p>and send a normal json for example </p>
  
  <pre><code>{ test: 'test' }
  </code></pre>
  
  <p>I do receive it correctly on the server.</p>