What is wrong with my JSON string in my Grist Add Records node?

Hello! I’ve been having issues with my JSON record string in my Grist Add Records node. No matter what I try, I keep getting a Configuration Error that says “Make sure the custom expression contains a valid JSON object: [object Object]”. I have used JSONstringify on my form variable, since I believe that’s Javascript, but it doesn’t work. Below is a shortened example of the JSON string I am inputting:

[ { “fields”: { “Name”: {{JSON.stringify(steps.trigger.event.answers[5].answer)}},
** “Date_Request_Submitted”: {{JSON.stringify(steps.trigger.event.created_at)}},**
** “Language”: {{JSON.stringify(steps.trigger.event.flag)}} } ]**

The Data Records from Input after testing shows something like:

[ { “fields”: { “Name”: “Testing”, “Date_Request_Submitted”: “2024-08-26 22:39:01”, “Language”: “0” } } ]

So even though the JSON string seems to be read correctly, I still get the configuration error.

I’m also not certain JSONstringify would be the best solution either, since I have some fields that are multi-select fields, and using JSONstringify turns the data into something like [“Tuesday”,“Wednesday”,“Thursday”,“Friday”] instead of just Tuesday,Wednesday,Thursday,Friday which would not directly import this data into Grist correctly for me as a multi-select.