Revision control
++ {
++ "firstName": "John",
++ "lastName" : "Smith",
++ "age" : 25,
++ "address" : {
++ "streetAddress": "21 2nd Street",
++ "city" : "New York",
++ "state" : "NY",
++ "postalCode" : "10021"
++ },
++ "phoneNumber": [
++ { "type" : "home", "number": "212 555-1234" },
++ { "type" : "fax", "number": "646 555-4567" }
++ ]
++ }