Apologies for getting late back to you.
Thanks for sharing the JSON which you have stored in No-SQL database, before helping you with your query just wanted to let you know that querying on values stored as an array is not possible. You can either store those values as string/integer to fetch it using the query and how you can fetch it in nested JSON.
You can simply create your query and pass the key as "id.parcela.variavel2" in your JSON and value on which you want to query using the EQUAL, LIKE, GREATER THAN or LESS THAN etc.
Regarding the addition to your document, you can append the value using the update functions of No-SQL Storage service. Please have a look at this link and let us know if you required any help from our side.