How to use "lockunspent" in bitcoin core wallet console? Try to use the Lockunspend RPC in bitcoin core wallet console. But always get wrong, and google it can't find answer. 

My input is: 

lockunspent false "[{"txid":"c3fa34606ae3ea416ff640d97414ef6a0a8afcebfbe2c60403ad60c0d961f04c","vout":0}]"


Is anyone can teach me where I am wrong? Thanks
The problem is, you should to escape the inner quotes:

lockunspent false "[{\"txid\":\"c3fa34606ae3ea416ff640d97414ef6a0a8afcebfbe2c60403ad60c0d961f04c\",\"vout\":0}]"