You can now add arbitrary or additional information to any of the accounts objects in either our Bolt or Embedded APIs using the Metadata field.
Metadata is a key-value pair object that can be added to addresses, payment methods, or the account profile. The metadata field is not read or used by Bolt, and thus can be used to attach information that is helpful for you and not necessary for interacting with Bolt.
Read more about this new field and see examples in our Embedded Metadata reference article. Or, you can see it in action in our Bolt or Embedded APIs.