title: how to send json post in cakephp
body: <p>I need to send exactly this: </p>
  
  <pre><code>POST http://api.outbound.io/api/v1/identify
  Content-Type: application/json
  {
   "api_key": "MY_API_KEY",
   "user_id": "MY_UNIQUE_USER_ID",
   "traits" : {
      "email" : "dhruv@outbound.io",
      "name" : "Dhruv Mehta",
      "phone" : "650xxxyyyyy"
   }
  }
  </code></pre>
  
  <p>i never did something like this and i've made a lot of research but i couldn't find how to send those parameters to that URL</p>
  
  <p>i hope you guys can help me with an example please, best regards!</p>