Which is the BEST syntax for storing an object in a variable?

Which is the BEST syntax for storing an object in a variable?

director $=\{$

firstName: "David",

lastName: $"$Lynch$"$

$\}$;

const director $=\{$

firstName: "David",

lastName: $"$Lynch$"$

$\}$;

director $=\{$

firstName $=$ "David",

lastName $="$Lynch$"$

$\}$;

const director $=\{$

firstName$("$David$"),$

lastName$("$Lynch$")$

$\}$;