Verification:
public key = "7c3ff12215636a7b246dea25d5e446a91fa59a9150c6ed50d8126ee86a648b68"
message = "0000a9d63800a0057c3ff12215636a7b246dea25d5e446a91fa59a9150c6ed50d8126ee86a648b6 87e2fad81dbf18f2da0860100640000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000000000000000000000 0000000000000000000"
signature = "4f0626ccd4edebb17e9d06e928b5b4e944aa7ef88a111081919794a3e265c206f9d9b0ce42a8d2e 7f6d902a172159bcd39dcaab8468373258fccea9e5d2ed319"
output = true

(The data from http://localhost:7874/nxt?requestType=getTransaction&transaction=14039483471941095190 and http://localhost:7874/nxt?requestType=getTransactionBytes&transaction=14039483471941095190)

Signing:

Similar, but take values from a transaction signed by ur account. This requires to reveal a secret phrase.