curl --request GET \
  --url https://test.deribit.com/api/v2/private/simulate_block_trade \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "private/simulate_block_trade",
  "params": {
    "role": "maker",
    "trades": [
      {
        "instrument_name": "BTC-PERPETUAL",
        "direction": "buy",
        "price": 11624,
        "amount": 40
      },
      {
        "instrument_name": "BTC-9AUG19-10250-P",
        "direction": "buy",
        "amount": 1.2,
        "price": 0.0707
      }
    ]
  }
}
'

{
  "jsonrpc": "2.0",
  "result": true
}