This endpoint cancels existing orders on the exchange for a particular event that you placed as a market maker.
POST /orders/* endpoints share a combined limit of 5,500 requests/min. See Rate Limits.The event for which orders should be cancelled
Your wallet signature over the cancel payload. See the Order Signing reference for details on how to compute this.
A random 32 bytes hex string to protect against replay
The account from which you are cancelling orders
The current timestamp in UNIX seconds to protect against replay