Adding in a specific field in the request body

Ask the Experts and Postman Tips
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1

I want to add later to a field in JSON request body, but I was not successful, how can I do it?
body :{
“payment”: {
“type”: “debit”,
“detail”: {}
}
}
console.log(_.get(JSON.parse(pm.request.body.raw),‘payment.detail’)); //I can reach the area I want.
let body = {
mode: ‘raw’,
raw:
JSON.stringify({
accType: ‘Iban’,
accNo: ‘{{$randomBankAccountIban}}’,
person: ‘{{$randomFirstName}} {{$randomLastName}}’,
bank: ‘{{$randomCity}}’
}),
options: {
raw: {
language: ‘json’
}
}
}
pm.request.body.update(body);