title: How to add a data using djongo which do not have any model defined in djongo
body: <p>I have a json which is not based on any django model but want to store it in mongodb using Djongo.
  Structure of json is as follow:
  {
  name:"test",
  desc:{
      type:1,
      tags:[2,4,5,5]
  },
  test:["asd","asda"],
  perform:True
  }</p>