Try this:
rule "Parsing key/value pairs"
when
true
then
set_fields
(
fields: key_value
(
value: to_string($message.message),
trim_key_chars: "",
trim_value_chars:"\"",
delimiters: " ",
kv_delimiters: "="
)
);
end
This should work if you’re sending the logs to a RAW input