How to use X-Hook-Signature for simple webhook verification

How to use X-Hook-Signature when writing Python web server

curl -H "X-Hook-Signature: $(echo -n '{"key":"value"}' | openssl dgst -sha512 -hmac "secret" -hex | cut -d" " -f2)"  \
  -H "Content-Type: application/json" -d '{"key":"value"}'  \
  http://127.0.0.1:5000/create-group