title: ValueError: arrays must all be same length
body: <p>I'm trying to create a dataframe with the results of this API request:
  <a href="https://poloniex.com/public?command=returnLoanOrders&amp;currency=ETH" rel="nofollow noreferrer">Link</a></p>
  
  <pre><code>json_url = https://poloniex.com/public?command=returnLoanOrders&amp;currency=ETH
  df = pd.read_json(json_url)
  </code></pre>
  
  <p>I get this error message:</p>
  
  <blockquote>
    <p>ValueError: arrays must all be same length</p>
  </blockquote>
  
  <p>How do I avoid this, please?</p>