echo -n '/openapi/api/btc/v1/webhook/addresses?tonce=1513746038205' | openssl dgst -sha256 -hmac "mpEFG56Nc9u5fUFjrg9mWoTEe8uk343X" # output: 8c640807d23a80b32f52fbb163afaa677fb33d5b0784017cf47074594ff72f16
echo -n '/openapi/api/btc/v1/webhook/addresses?tonce=1513746038205' | openssl dgst -sha256 -hmac "mpEFG56Nc9u5fUFjrg9mWoTEe8uk343X" # output: 8c640807d23a80b32f52fbb163afaa677fb33d5b0784017cf47074594ff72f16