FVyBuildSignatureRequestVariant

VariantType	EVyBuildSignatureRequestType	The cryptographic signature method to be used: - `MESSAGE`: Plain message signing (personal_sign) - `EIP712`: Structured data signing following EIP-712 standard for typed data
Eip712	FVyOptBuildEip712SignatureRequestDto
Message	FVyOptBuildMessageSignatureRequestDto