curl --request POST \
  --url https://prv.stake.biya.io/stake/buyback/rounds \
  --header 'Content-Type: application/json' \
  --data '
{
  "round_id": "<string>",
  "start_time": "<string>",
  "end_time": "<string>",
  "total_slots": 123,
  "min_amount": "<string>",
  "max_amount": "<string>"
}
'

{
  "round": {
    "id": "<string>",
    "round_id": "<string>",
    "start_time": "<string>",
    "end_time": "<string>",
    "status": 123,
    "total_slots": 123,
    "booked_slots": 123,
    "min_amount": "<string>",
    "max_amount": "<string>",
    "total_collected": "<string>",
    "revenue_pool": "<string>",
    "burn_tx_hash": "<string>",
    "created_at": "<string>",
    "updated_at": "<string>"
  }
}