const source = {
  prev: [],
  current: {
    list: [{ a: 1, b: 2, c: 3 }],
    data: [{ c: 1, b: 2 }]
  },
  id: 12,
  next: []
};

copy.prev = [...source.prev]
copy.current.list = [...source.current.list]
copy.current.data= [...source.current.data]