title: Jackson read value as string
body: <p>I have an object with unknown values, say</p>
  
  <pre><code>{
   "data": [
      {"a":...,
      "dont_know_what_else_is_here":....}
   ]
  }
  </code></pre>
  
  <p>And I just want to store the value of "data" as a string into a variable/database. </p>
  
  <p>How should I read it from the streaming API?</p>