curl --request POST \
  --url https://api.example.com/solana/airspace \
  --header 'Content-Type: application/json' \
  --data '
{
  "property_id": "<string>",
  "min_alt_m": 123,
  "max_alt_m": 123,
  "poly_lat": [
    123
  ],
  "poly_lon": [
    123
  ],
  "fee_lamports": 123,
  "treasury": "<string>"
}
'

{
  "signature": "<string>",
  "slot": 123,
  "confirmation": "<string>",
  "fee_lamports": 123
}