Parsing of a sub-element

Hi,

I've got an input like this:
{
"_index": "index-2019.07.11",
"_type": "doc",
"_id": "id",
"_version": 1,
"_score": null,
"_source": {
"message": "{ "time": "2019-07-11T14:17:18.7132501+03:00", "level": "ERROR", "message": "{\"AddedTime\":\"2019-07-11 14:17:18.0570\",\"RequestedTime\":\"2019-07-11 14:17:18.0570\",..."" }\r",
"path": "/mnt/logs/CachedTariffProvider_Error.log",
"host": "host",
"@version": "1",
"@timestamp": "2019-07-11T13:30:54.756Z"
},

The main JSON container consist of internal field "message", which also has got a field named "message".

I have to extract all the fields from those two fields "message" and put them at the top level in order to have the final output look like:
index
type
id
version
_score
time
level
AddedTime
RequestedTime
path
host
@version
@timestamp
...

Additional difficulty is that there are special symbols in the field message: "/", """, ":", etc.

I have spent a lot of time searching this and other forums, as well as reading the official docs, and found no clear answer (.

My logstash filter config:

filter {
date {
match => [ "time", "yyyy-MM-dd HH:mm:ss.SSSS" ]
target => "@timestamp"
}

    json {
            source => "message"
    }

    split {
            field => "message"
    }

    mutate {
            add_field {
                    "time" => "%{[message][time]}"
                    "level" => "%{[message][level]}"
                    "message" => "%{[message][message]}"
                    "logger" => "%{[message][logger]}"
                    "exception" => "%{[message][exception]}"
                    "EventId.Id" => "%{[message][EventId.Id]}"
                    "EventId.Name" => "%{[message][EventId.Name]}"
                    "EventId" => "%{[message][EventId]}"
            }

            remove_field => [ "[message]" ]
    }

}

An errors happen:

  1. Can't merge a non object mapping [EventId] with an object mapping [EventId]...
  2. Expected one of #, => at line 23, column 13 (byte 404) after filter ...
    ...and some other ones.

How could I extract all the fields from "messages" and put them at top level of JSON output?

Any help would be appreciated, thank you!

What is the complete error message and what does line 23 look like?

I've already fixed it, missed out "=>" between "add_field" and "{"