[{_id:"abc12344",renderId:"123456789",concernTo:[{name:"vijay 4",id:"snhdkjn786786",commons:[]},{name:"ak",id:"sdkfg787877",commons:[]}]}]

db.collection.update({renderId:"123456789","concernTo.id":"snhdkjn786786",},{"$push":{"concernTo.$[elem].commons":{to:"xyz",from:"abc"}}},{arrayFilters:[{"elem.id":"snhdkjn786786"}]})