Double quoted json data in CSV returns EOF

I've set up an HTTP request element that pulls data from a CSV file and
I've run into a frustrating problem. Each line of data in the CSV file
represents the data for a user request, separated by a pipe character. See
below for example:

1.0.3|facebook|100000964541055|null|2014-03-19
10:59:14|{'test':'test'}|MWQyNzQzZjc4Yjc0YmZhZDk5NjlmYzA2ZDlhY2Y2Mjg3NmVkOWM1OQ==

For the record, the JSON above is a very basic example I've been using to
try and troubleshoot this issue - the actual data will be a much longer,
more complex object.

Anyway, we've found that if we include the double quotes in
the JSON string, then when the request actually fires off and the data is
populated from the CSV file, the JSON string is instead replaced by <EOF>.
If we remove the double quotes or replace them with single quotes, then the
JSON is pulled correctly, but this breaks something else since single
quotes in JSON are not valid.

I've tried escaping the double quotes using a backslash, and alternately by
doubling up the double quotes, but neither appears to work. Does anyone
have any suggestions for how we can make this work?

Thanks,
Guy

guy [ at ] eastsidegamestudio.com