How to map array inside message in Logstash HTTP Output - logstash

Question

I am using Logstash to update by query existing Elasticsearch documents with an additional field that contains aggregate values extracted from Potgresql table.
I use elastichsearch output to load one index using document_id and http output to update another index that have different document_id but receving errors:
[2023-02-08T17:58:12,086][ERROR][logstash.outputs.http ][main][b64f19821b11ee0df1bd165920785876cd6c5fab079e27d39bb7ee19a3d642a4] [HTTP Output Failure] Encountered non-2xx HTTP code 400 {:response_code=>400, :url=>"http://localhost:9200/medico/_update_by_query", :event=>#LogStash::Event:0x19a14c08}
This is my pipeline configuration:
input {
jdbc {
# Postgres jdbc connection string to our database, mydb
jdbc_connection_string => "jdbc:postgresql://handel:5432/mydb"
statement_filepath => "D:\ProgrammiUnsupported\logstash-7.15.2\config\nota_sede.sql"
}
}
filter {
aggregate {
task_id => "%{idCso}"
code => "
map['idCso'] = event.get('idCso')
map['noteSede'] ||= []
map['noteSede'] << {
'id' => event.get('idNota'),
'tipo' => event.get('tipoNota'),
'descrizione' => event.get('descrizione'),
'data' => event.get('data'),
'dataInizio' => event.get('dataInizio'),
'dataFine' => event.get('dataFine')
}
event.cancel()"
push_previous_map_as_event => true
timeout => 60
timeout_tags => ['_aggregatetimeout']
}
}
}
output {
stdout { codec => rubydebug { metadata => true } }
# this works
elasticsearch {
hosts => "https://localhost:9200"
document_id => "STRUTTURA_%{idCso}"
index => "struttura"
action => "update"
user => "user"
password => "password"
ssl => true
cacert => "/usr/share/logstash/config/ca.crt"
}
http {
url => "http://localhost:9200/medico/_update_by_query"
user => "elastic"
password => "changeme"
http_method => "post"
format => "message"
content_type => "application/json"
message => '{
"query":{
"term":{
"idCso":"%{idCso}"
}
},
"script":{
"source":"ctx._source.noteSede=params.noteSede",
"lang":"painless",
"params":{
"noteSede":"%{noteSede}"
}
}
}
}'
}
}
The stdout output show me the sended docs to output like this:
{
"query" => {
"term" => {
"idCso" => "859119"
}
},
"script" => {
"source" => "ctx._source.noteSede=params.noteSede",
"lang" => "painless",
"params" => {
"noteSede" => "{dataFine=null, dataInizio=2020-02-13, descrizione=?, tipo=DB, id=6390644, data=2020-02-13 12:26:58.409},{dataFine=null, dataInizio=2020-02-13, descrizione=?, tipo=DE, id=6390645, data=2020-02-13 12:26:58.41}"
}
}
}
}
How could I set noteSede array field into message to _update_by_query ?