Parse JSON data within SQL Server Integration Services Package?

I'm trying to set up an SSIS job that will pull a JSON-encoded mailing list from MailChimp, compare it to a list of customers in our CRM database (SQL Server), and upload via JSON any new customers not already there. I can't seem to find anything on serializing/deserializing JSON within SSIS, other than writing a script task, and it seems that I can't import the .Net serialization libraries into a script. Any suggestions? Thanks in advance!