How to parse comma delimited file with json array columns

[Edith1]

I have a comma delimited file (.CSV) and there's a few columns that have json array data. I need those columns to be split into 1 column but its splitting into several columns. How can I do that?

Here's an example of 1 data row: 

mhsge@xx.com,John,Doe,"[{""FieldName"": ""Upload"", ""FileName"": ""CSWE2023_Ps.pdf"", ""FileName"": ""851171f2-9821c3.pdf""}]"

Here's the setting for the input: 

• 1st column does result in the email 
• 2nd column does result in first name
• 3rd column does result in last name
• ISSUE: 4th column splits into several columns and I want the entire string data for the json array
  • splits into 3 columns: 
    • "[{""FieldName"": ""Upload""
    • ""FileName"": ""CSWE2023_Ps.pdf""
    • ""FileName"": ""851171f2-9821c3.pdf""}]"

Thank you in advance!