Dynamo DB - Build PK from Source table

I am trying to play with our airbyte playground and have created a connection from snowflake to dynamo DB . My entire source table from snowflake is stored in the dynamo DB table as “Airbyte_data” , I want to store the PK from my source table as the PK for the dynamo DB table so I can query the data but I am not able to do that , by default dynamo DB comes with a default schema . Is it possible to do something like this ? if so is there ay documentation around it ?