Get ask order IDs given an asset ID, in order of decreasing bid price or increasing ask price.
Request:requestType is getAskOrderIdsasset is the asset ID
firstIndex is a zero-based index to the first order ID to retrieve (optional)
lastIndex is a zero-based index to the last order ID to retrieve (optional)
Response:
(A) bidOrderIds or askOrderIds is the array of order IDs
(N) requestProcessingTime is the API request processing time (in millisec)