Split a csv fied into nested array

hello,I use logstash to import csv to elasticsearch, my question is that one of the fields contains the string formatted as [{"level1":aa,"level2":bb},{"level1":aaa,"level2",bbb},...],The field, is array.and i need to parse this and put into elasticsearch like this eg:
{ "level1":"aa",
{ "level1":"aaa",
. what are possible solutions for this?Thank you!

Provided the string is valid JSON (e.g. all the string values are in double quotes) a simple JSON filter will parse that

json { source => "someColumn" target => "someField" }

Ok,I will try it,thank you!

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