Prepare data import files

For the data migration, four different data files are in use:

• The person JSON file enables the import of customer details into the person module.

• The account JSON file enables the import of the customer's bank account information into the account module.

• The account transactions JSON file enables the import of the account transaction details into the account module.

• The loan contract JSON file enables the import of the active version of the loan contracts into the loan module.

A single JSON file can contain a max of 100 000 records, not greater than 200 MB. And the whole request max size is 1.2 GB.