To set up your account with a multisig:
The Owner must invite the other multisig signers as Franklin administrators.
All multisig signers need to complete their administrator onboarding process.
Enough signers must be onboarded to meet the minimum number of signatories required to authorize a transaction. Franklin only requires the minimum signing threshold of the wallet to be registered as administrators. For example, if there is a 3 of 5 signing threshold, Franklin requires 3 of the signers are administrators.