RecipientsGroupAssignedTo(Recipient Group)

{
    "name": "Group name",
    "members": [
        {
            "id": "027d6a8e-bd05-45dc-a609-43840d523b7b",
            "email": "email@example.com",
            "first_name": "John",
            "last_name": "Doe"
        }
    ],
    "type": "recipient_group"
}