To generate the signature, you will need create a key pair of private key and public key. You will share the public key with us and use the private key to generate the signature.
· You can use this command openssl genrsa -out privatekey.pem 2048 –nodes to generate the key pair
· Use a library like open ssl to generate the signature using your private key
Please find more information on our developer references here: https://developer.jengaapi.io/v3/docs/generating-signatures