Appends signature (using signer's sk) to multi-signed logic signature. If multisig is not found
then new multisig is created
eg. appending own signature to a signed lsig (received from multisignature account address network)
Returns
multi signed logic signature (with appended signature using signer's sk)
Appends signature (using signer's sk) to multi-signed logic signature. If multisig is not found then new multisig is created eg. appending own signature to a signed lsig (received from multisignature account address network)
Returns
multi signed logic signature (with appended signature using signer's sk)