Generate a JSON value

How do I generate a JSON value like below

{
"id":1,
"name": {
"full_name" : "Kees, Yanaton", // Mockaroo generated value using function/formula
"first_name" : "Yanaton", // Mockaroo generated value using function/formula
"last_name":"Kees" // Mockaroo generated value using function/formula
}
}

Thanks!