[{_id:1,id:"a",markets:[{type:"car",price:10000},{type:"toy",price:10}]},{_id:2,id:"b",markets:[{type:"car1",price:10234},{type:"toy1",price:1032}]},{_id:3,id:"c",markets:[{type:"car2",price:10000},{type:"toy2",price:1023}]}]

db.collection.update({id:"a"},{$set:{"markets.$[element]":{type:"car3",price:11200}}},{arrayFilters:[{element:{type:"car",price:10000}}]})