Elasticsearch array of an object using logstash

I have a mysql database working as a primary database and i'm ingesting data into elasticsearch from mysql using logstash. I have successfully indexed the users table into elasticsearch and it is working perfectly fine however, my users table has fields interest_id and interest_name which contains the ids and names of user interests as follows:

"interest_id" : "1,2",
"interest_name" : "Business,Farming"

What i'm trying to achieve:
I want to make an object of interests and this object should contain array of interest ids and interests_names like so:

interests : {
[
"interest_name" : "Business"
"interest_id" : "1"
],
[
"interest_name" : "Farming"
"interest_id" : "2"
]
}

Please let me know if its possible and also what is the best approach to achieve this.

My conf:
input {
jdbc {
jdbc_driver_library => "/home/logstash-7.16.3/logstash-core/lib/jars/mysql-connector-java-8.0.22.jar"
jdbc_driver_class => "com.mysql.jdbc.Driver"
jdbc_connection_string => "jdbc:mysql://localhost:3306/"
jdbc_user => "XXXXX"
jdbc_password => "XXXXXXX"
sql_log_level => "debug"
clean_run => true
record_last_run => false
statement_filepath => "/home/logstash-7.16.3/config/queries/query.sql"
}
}

filter {
mutate {
remove_field => ["@version", "@timestamp",]
}
}
output {
elasticsearch {
hosts => ["https://XXXXXXXXXXXX:443"]
index => "users"
action => "index"
user => "XXXX"
password => "XXXXXX"
template_name => "myindex"
template => "/home/logstash-7.16.3/config/my_mapping.json"
template_overwrite => true
}
}

I have tried doing this by creating a nested field interests in my mapping and then adding mutate filer in my conf file like this:

mutate {
rename => {
"interest_id" => "[interests][interest_id]"
"interest_name" => "[interests][interest_name]"
}

With this i'm only able to get this output:
"interests" : {
"interest_id" : "1,2",
"interest_name" : "Business,Farming"
}