Executes a raw JSON-RPC request on the client session.
Lower-level than executeMethod — allows full control over the RPC request structure.
Complete JSON-RPC request object. See JSONRPCRequest.
Optional RPC execution options (timeout, etc.). See PendingRPCOptions.
Promise<T>
The RPC response.
If the RPC call returns an error response.
executeMethod — higher-level wrapper for member-targeted Verto methods.