Need help with tJSONDOC to create JSON nested

[Aznrhmn_97]

Hi, I'm new with Talend and still learning. I don't know how to create this json structure. 

{
   "Group":"Saga",
   "ID_Details":{
      "1":{
         "Attribute":{
            "Type":"None"
         },
         "ChildName":"Saga1",
         "Total":23,
         "Active":true
      },
      "2":{
         "Attribute":{
            "Type":"None"
         },
         "Child Name":"Saga2",
         "Total":23,
         "Active":true
      }
   }
}

I used tWriteJSONField but it not came out like what I expected. Some of community suggest me to use tJSONDoc but I'm stuck. Can someone help me?