...
Payrix must know, prior to import, which user the imported tokens are to be associated with, and optionally which merchant, on the Payrix platform.
Import process maps processor token IDs to new Payrix token IDs, customers, and custom fields.
5) Payrix
...
communicates token import results
You will be notified once the import has completed, then you can query the API for the old processor tokens to determine the new equivalent Payrix tokens. Payrix’s token.custom field will contain the old processor’s token ID, while Payrix’s customer.custom field will contain the old processors customer ID.
...