How to get value from json in shopify liquid

{"collections"=>{"1656046380"=>[{"collection_title"=>"sport"}, {"question"=>"q_0", "answer"=>"a_0"}, {"question"=>"q_1", "answer"=>"a_1"}, {"question"=>"q_2", "answer"=>"a_2"}], "1656047118"=>[{"collection_title"=>"cars"}, {"question"=>"q_0", "answer"=>"a_0"}, {"question"=>"q_1", "answer"=>"a_1"}, {"question"=>"q_2", "answer"=>"a_2"}]}, "group"=>{"1656046878"=>[{"group_title"=>"page1"}, {"style"=>"3"}, {"selected_coll"=>"["1656046380","1656046423"]"}]}}

If this is my data which I am getting using liquid for loop

{%- for field in shop.metafields.advance_faq_app -%}

{{ shop.metafields.advance_faq_app.advance_faq_app }}

{%- endfor -%} 
I am able to get this data "group"=>{"1656046878"=>[{"group_title"=>"page1"}, {"style"=>"3"}, {"selected_coll"=>"["1656046380","1656046423"]"}]}}

Using {{ shop.metafields.advance_faq_app.advance_faq_app.group }} in the above for loop

How can I get the value of "group_title"

Thanks In advance

{{ shop.metafields.advance_faq_app.advance_faq_app.group.group_title }}