How to use enums for class functions - swift

Question

I'm working on a project and I have created a class to handle the json response to convert it to modal class and change it back to json request with updated data if needed.
Here in the class I'm getting and saving values from and into dictionary. I need to create an enum for the dictionary keys so that there should be less chance for error for complex key formats.
I even tried using like
enum Fields {
case Name
case Email
}
but Fields.Email return Fields object
if I use a protocol of a variable like
protocol someProtocol {
var name: String { get }
}
extension someProtocol {
var name:String {
return String(describing: self)
}
}
and then extend the enum Fields:someProtocol
then I can use it like Fields.name.name or Fields.email.name
But My client will not approve this I want to create an enum so that I can access the string directly like for name I want key "Name" and I should get it liek "Fields.name" or ".name"
So here I have two objectives
first it that I need to create something that can be accessed through class function
second it should be common so that I can use it with multiple classes
third I can access it with less operators
—
class PersonService {
class Update {
var name = ""
var email = ""
var personId = 0
func createDataFrom(dic:[AnyHashable : Any]) -> Update {
let update = Update()
update.name = dictionary["Name"]
update.email = dictionary["Email"]
update.personId = dictionary["Id"]
return update
}
func createDataTo() -> [AnyHashable:Any] {
var ret = [AnyHashable : Any]()
ret["Name"] = name
ret["Email"] = email
ret["Id"] = personId
return ret
}
}
}

Answer 1

Something like that?
enum Fields: String {
case Name = "Name"
case Email = "Email"
}
Print(Fields.Name.rawValue)
result: "Name"
Or
struct Constants {
static let name = "Name"
static let email = "Email"
}
print(Constants.name)
result: "Name"