Create common codable for slightly different json responses - Swift

Question

How to create a common codable struct in swift for slightly different json responses.For example response A and B has almost same attributes and B has some extra attribute called Designation.Is it possible to create common codable struct for this scenario?

//Response A
{
  "name" : "Jhon",
  "age" : 23,
  "mobile" : "+11012341234",
  .
  .
  .
}

//Response B
{
  "name" : "Jhon",
  "age" : 23,
  "mobile" : "+11012341234",
  .
  .
  .
  "designation": "Manager"
}