The thing is, there are very few things in the shape of a rope that are designed and rated for holding ~60+ kg. Cables might work, but the manufacturer won't tell you how much weight they can hold because why would they test that? So you won't know if it'll work until it's too late. A thick cable (say, a 1/4-inch audio cable) with a braided exterior might do it, but why bother when you can buy a 1/2-inch polyester rope for $30 that's rated for 100 kg?
Avoid rubber-lined cables; the rubber can easily fray and rip under tension.