How to correctly save related data Principles of REST api?

Question

RESTful API

Option 1.
PUT server.com/location/656
body:

{
  name: '',
  status: 1,
  manager: {
    id: 546
 }
}

and as a result, I expect that the manager will be linked to this location and its properties will be updated
Option 2.
PUT server.com/location/656
body:

{
  name: '',
  status: 1,
  manager: {
    name: 'Вася'
 }
}

and as a result, I expect that a manager will be created and it will link to this location, and its properties will be updated.
How true is this? is it worth splitting this action into two actions perhaps?
PS do not scold too much in these matters, I'm new.