marketplace_cancel_offer
Cancel existing offer that this wallet created(it actually create transaction that says that existing order got canceled).
URL: http://127.0.0.1:31113/json_rpc
Request:
{
  "id": 0,
  "jsonrpc": "2.0",
  "method": "marketplace_cancel_offer",
  "params": {
    "fee": 1000000,
    "no": 0,
    "tx_id": "40fa6db923728b38962718c61b4dc3af1acaa1967479c73703e260dc3609c58d"
  }
}
Request description:
    "fee": Fee for operation.
    "no": Number of offer entrie inside transacton(likely 0).
    "tx_id": Transaction ID represented as a hexadecimal string.
Response:
{
  "id": 0,
  "jsonrpc": "2.0",
  "result": {
    "tx_blob_size": 1232,
    "tx_hash": "40fa6db923728b38962718c61b4dc3af1acaa1967479c73703e260dc3609c58d"
  }
}
Response description:
    "tx_blob_size": Size of the transaction blob.
    "tx_hash": Transaction hash.