https://us16.api.mailchimp.com/3.0/lists/a7376d39e8/members/a3521b477d24a82806b88b4aabcdde03
{"email_address":"vineetgupta013@gmail.com","status":"subscribed","merge_fields":{"FNAME":"vineet","LNAME":"gupta"}}
{"type":"https://mailchimp.com/developer/marketing/docs/errors/","title":"Resource Not Found","status":404,"detail":"The requested resource could not be found.","instance":"a8604b41-9a20-7e81-e3fd-6c3dd733bf39"}