Use the Auto-map action to contextually automatically map data from JSON to the clipboard or the clipboard to JSON. Use this action with Page or Page List properties that has a data model of the property's page class exactly matches the JSON data model. The name and type of every child field is exactly the same in both the JSON data and the clipboard.
For more information on mapping and JSON serialization and deserialization, see the following articles on the PDN:
Using the mapping API for high-performance JSON serialization
Auto-map .Customer to person
Auto-map .CustomerList to people