Get Proof-of-Transfer details

{
  "contract_id": "string",
  "first_burnchain_block_height": 0,
  "min_amount_ustx": 0,
  "registration_window_length": 0,
  "rejection_fraction": 0,
  "reward_cycle_id": 0,
  "reward_cycle_length": 0,
  "rejection_votes_left_required": 0,
  "total_liquid_supply_ustx": 0
}