How read value from uri key json

i have this object

{
  'http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier': '918312asdasc812',
  'http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name': 'Login1',
  'http://schemas.microsoft.com/ws/2008/06/identity/claims/role': 'User'
}

How read value for key ‘http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier’?