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