[{"_id":"64a5a396ec152ab4f5e1c60c","firstName":"Vinayak","lastName":"Pandey","email":"abc@123.com","password":"$2b$10$dpAmLPa9imDKn3qeyhZ/hOwolO6NOYVwNvVgBc9PY8XZZ3n4WYh/O","Wallets":[{"name":"paytm","amount":500},{"name":"hdfc","amount":5000},{"name":"test","amount":3020}]}]

db.collection.update({email:"abc@123.com","Wallets.name":"paytm"},{"$inc":{"Wallets.$.amount":-50}})