FDMongoQuery QMatch impossible to find using ObjectId RAD Studio 10.1 C++Builder

Hello,

I'm trying to filter a FDMongoQuery, inserting in the QMatch property the word ObjectId I faced the error 'unexpected character encoountered while parsing value: O. Path ..."

this is the query in MongoDb

db.nationalities.find({"_id": ObjectId("57ab21437a7c333d8c000441")})

this is the QMatch value String in the FDMongoQuery
{"_id": ObjectId("57ab21437a7c333d8c000441")}

can you help me ?