title: Add variables names to json data dynamically
body: <p>I just want to know is there a way by which variable names can by set dynamically . For example this is sample json data</p>
  
  <pre><code>let obj={
      "data_type": "data according to date",
      "status_message": "",
      "data": []
  }
  </code></pre>
  
  <p>I want to add new variable array in obj.data according to date automatically.
  I'll be getting new data everyday so instead of appending in single node , i want it to be in different node according to date.</p>
  
  <p>new format of json</p>
  
  <p><a href="https://i.stack.imgur.com/CdbBz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CdbBz.png" alt="new format of json"></a></p>
  
  <p>Sorry if this is a noob question, but i couldn't find answer anywhere.</p>