Borsh-encode a delegate action for inclusion as an action within a meta transaction
NB per NEP-461 this requires a Borsh-serialized prefix specific to delegate actions, ensuring
signed delegate actions may never be identical to signed transactions with the same fields
Parameters
delegateAction: DelegateAction
Delegate action to be signed by the meta transaction sender
Borsh-encode a delegate action for inclusion as an action within a meta transaction NB per NEP-461 this requires a Borsh-serialized prefix specific to delegate actions, ensuring signed delegate actions may never be identical to signed transactions with the same fields