title: AutoML REST call with score_threshold returns 400 Bad Request
body: <p>When I make a call to the Predictor and I add the score_threshold as shown below:</p>
  
  <pre><code>{
    "payload": {
      "image": {
        "imageBytes": "YOUR_IMAGE_BYTES"
      },
      "params": { "score_threshold": "0.0" },
    }
  }
  </code></pre>
  
  <p>I get an error 400 Bad Request. The call works just fine (I get a prediction from AutoML) without the score_threshold clause. I'm using VB.Net for the call so wondering if there's a trick to formatting the call. I've also tried removing the quotes from the score as it is listed as a Float in the documentation with the same result.</p>