What is this Serialization Syntax - And how to parse it with Ruby

Question

I have to manipulate this data structure in Ruby. I don't know what's is the name of this syntax. And what is the Ruby gem to process it.

(
    spellCorrectionEnabled:true,
    recentSearchParam:(
        id:2098298945,
        doLogHistory:true
    ),
    filters:List(
        (
            type:REGION,
            values:List(
                (
                    id:102748797,
                    text:Texas%2C%20United%20States,
                    selectionType:INCLUDED
                )
            )
        ),(
            type:COMPANY_TYPE,
            values:List(
                (
                    id:G,
                    text:Government%20Agency,
                    selectionType:INCLUDED
                )
            )
        )
    ),
    keywords:Texas
)

More insights

I have to write a Ruby script to process a LinkedIn search like this:

https://www.linkedin.com/sales/search/people?query=(spellCorrectionEnabled%3Atrue%2CrecentSearchParam%3A(id%3A2098298945%2CdoLogHistory%3Atrue)%2Cfilters%3AList((type%3AREGION%2Cvalues%3AList((id%3A102748797%2Ctext%3ATexas%252C%2520United%2520States%2CselectionType%3AINCLUDED)))%2C(type%3ACOMPANY_TYPE%2Cvalues%3AList((id%3AG%2Ctext%3AGovernment%2520Agency%2CselectionType%3AINCLUDED))))%2Ckeywords%3ATexas)&sessionId=6TwMT4RnQoK7HiG1NZnIGw%3D%3D&viewAllFilters=true

The querystring has one parameter only: query.

I get the value of such a query parameter using this script:

url = o.url
uri = URI.parse(url)
params = CGI.parse(uri.query)
query = params['query'].first