curl --request GET \
  --url https://drb.coinbase.com/api/v2/private/close_position \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 6130,
  "jsonrpc": "2.0",
  "method": "private/close_position",
  "params": {
    "instrument_name": "ETH-PERPETUAL",
    "price": 145.17,
    "type": "limit"
  }
}
'

{
  "id": 6130,
  "jsonrpc": "2.0",
  "result": {
    "order": {
      "amount": 21,
      "api": true,
      "average_price": 202.8,
      "creation_timestamp": 1590486335742,
      "direction": "sell",
      "filled_amount": 21,
      "instrument_name": "ETH-PERPETUAL",
      "is_liquidation": false,
      "is_rebalance": false,
      "label": "",
      "last_update_timestamp": 1590486335742,
      "max_show": 21,
      "order_id": "ETH-584864807",
      "order_state": "filled",
      "order_type": "limit",
      "post_only": false,
      "price": 198.75,
      "reduce_only": true,
      "replaced": false,
      "time_in_force": "good_til_cancelled",
      "web": false
    },
    "trades": [
      {
        "amount": 21,
        "direction": "sell",
        "fee": 0.00007766,
        "fee_currency": "ETH",
        "index_price": 202.86,
        "instrument_name": "ETH-PERPETUAL",
        "liquidity": "T",
        "mark_price": 202.79,
        "matching_id": null,
        "order_id": "ETH-584864807",
        "order_type": "limit",
        "post_only": false,
        "price": 202.8,
        "reduce_only": true,
        "state": "filled",
        "tick_direction": 0,
        "timestamp": 1590486335742,
        "trade_id": "ETH-2696097",
        "trade_seq": 1966068
      }
    ]
  }
}