Syntax: cat <filename> | jq -c '[.[] | select( .<key> | contains("<value>"))]' > <path_to_new_file.json>
Example: To get json record having _id equal 611
cat my.json | jq -c '[.[] | select( ._id | contains(611))]' > ./myProject/jsons/filtered.json
Remember: if JSON value has no double quotes (eg. for numeric) to do not supply in filter i.e. in contains(611)