how to pass array in expression rule

I



I want the result of this expression rule to be in the below format or the highlighted format in the editor. currently I am passing name and comment from one CDT ,now along with this 2 fields  I need to pass the colleagues array with add array with in the colleague array.

I have created other new  CDT for colleague array with id , typeid and addcolleague array in it ,how to call it in the expression rule to get the result in the below format . Please advise



How can I get this result in the below format ,can someone please advise


Expected RESULT

a!toJson

({

"name": "string",
"Comment": "string",

Colleagues:
{

{

"TypeId": 1,
addColleague:

{
"email": "string",
"displayName": "String",
"eFlag": false,
"dFlag": false,
"ProviderID": 2,
"idFromProvider": "string"   }

}

}


})