curl -X 'POST' \
  'https://api.bitski.com/v2/historical-floor-prices/batch?duration=ONE_MONTH' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "contractIds": [
    {
      "address": "0x1C505d3AC1B902b69bc153aEdad477c9bC9ccde7",
      "chainId": 1,
      "coinType": 60
    }
  ]
}'

{
  "collections": [
    {
      "contractId": {
        "address": "0x1C505d3AC1B902b69bc153aEdad477c9bC9ccde7",
        "chainId": 1,
        "coinType": 60
      },
      "prices": [
        {
          "closingFloorPrice": "110.00",
          "currency": "USD",
          "date": "2023-04-25",
          "highestFloorPrice": "150.00",
          "lowestFloorPrice": "90.00",
          "openingFloorPrice": "100.00"
        }
      ]
    }
  ]
}