[Flutter] converting string to map in dart

I wanted to convert a string to map.

String value = "{first_name : fname,last_name : lname,gender : male, location : { state : state, country : country, place : place} }"


into

Map = {
first_name : fname,
last_name : lname,
gender : male,
location = {
state : state,
country : country,
place : place
}
}


How do I convert the string into a map<String, dynamic> where the value consists of string, int, object, and boolean?

I wanted to save the string to a file and obtain the data from the file.

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