[Plugin] Http/s REST, blueprintable JSON and Parse REST API manager at once (VaRest)

I’m currently trying to use VaRest to login to a server via a third party api.

I should be able to login by either processing a cURL or by passing headers and a body via a url.
I’ve not be able to get VaRest to post correctly to the server.

If I copy the cURL link from the api dashboard and into the Process URL node then the request fails and i get the same if i follow the logic in the attached screenshot. When i’m using the Set String Request Content, i’m only doing so because I couldn’t find anything else relating to adding body content.

I have experience working with PHP before inside of Unity but this is my first time using posting JSON so i’m sure there is something really simple that i’m missing.

EDIT:
So it seems to be working now using the Set String Field and Set Fields. How ever nesting a JSON field inside a field adds in square brackets and not curly brackets along with another formatting issue. Can anyone suggest how to get around this. I’ll attach a screen shot.