Get PoX cycles

{
  "limit": 200,
  "offset": 0,
  "total": 0,
  "results": [
    {
      "block_height": 0,
      "index_block_hash": "string",
      "cycle_number": 0,
      "total_weight": 0,
      "total_stacked_amount": "string",
      "total_signers": 0
    }
  ]
}