How to create JSON file without wrapping in an array?

FTP import to create a JSON file for a single record. External system expects the file to contain a single JSON object definition, not an object in an array. Is there a way to prevent Integrator.io from assuming the JSON file contains an array of records?

I want this:

{"test":"SO-AU-6"}

not this:

[{"test":"SO-AU-6"}]

I tried defining a JSON document template, but that is giving me a different set of problems.

Any ideas?

@steveklett see solution here: https://connective.celigo.com/t/error-footer-not-found-in-the-template-when-saving-json-file-to-ftp/74