title: R parsing string
body: <p>I did a request using RCurls and is giving me the token I need. The answer for the request is the following:</p>
  
  <pre><code>r&lt;-POST(url,body = data)
  content(r)
  "{\"token\" : \"WiKuxCc2VboCLBc_MbtKrKtDkJnDSntrGjYrazbgs1FRX_BAj-p2gadILBNhk9JBti0m6o_i7DYaqf4R4i2xPh1TedYWpCrINShiFrB7xabbv8zT-8LCBTUau14HPZzv\",\"expires\" : 1425681647918,\"ssl\" : false}"
  </code></pre>
  
  <p>How can I parse this string that I've got from <code>content(r)</code> to get only the Token?</p>
  
  <p>Thanks in advance</p>