curl --url "http://127.0.0.1:7778" --data "{\"method\":\"dumpprivkey\",\"params\":[\"522102c866c51b603e2d943774314b88aff1eb04aef3971fcf34503c8f07d27915bc1d2102e053cc9d98d9e157917ed74bcabeaf72006b1ecf019d148dd3eac06271b6bcf02102869ca05bf6b476bb8cb433e08846a67037b921062f49cd0f9f66087454e88abb53ae\"]}"