How To Create A JSON Request With More Than One Array Element?

How To Create A JSON Request With More Than One Array Element?


I am using the postURL functionality. JSON Request body contains more than one array element like shown below,

Original JSON Request Body Format To Be Used:

  "Name": "Hello World",
  "Roles": [
"Profile": "asdf",
"Description": "sent"

This is my code used for creating above JSON request using "map()" functionality,

  myMapData = map();
  myMapData.put("Name", "Hello World");
  myMapData.put("Description", "sent");

//  I used the following code for creating "Roles" array element which i referenced from a blog listed below

// Code For "Roles"

   start_list = List(); 
    start_list = {"node1"};
    end_list = List();
    for each r in start_list
            myMapTemplateRoles = map();
            stringMap = myMapTemplateRoles;

// End Of Code For Roles

myMapData.put("Roles", end_list);

// End Of Code

JSON Request Body Format Obtained using above code:

  "Name": "Hello World",
"Profile": "asdf",
"Description": "sent"
The above "obtained JSON Format" is displayed as Invalid when tested with 
websie below,
When i pass the above "obtained JSON Format" through postUrl,i am getting 
an error "Bad JSON Request". I think extra quotation marks(hi lighted)before and 
after square brackets of "Roles" in JSON Request is creating this error.
I have followed the same steps for creating a map variable then why 
i am getting an invalid JSON Format string while creating through map(). 
Please let me know if there is any problem in my code.

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