Cancel bet -32602 error

[fossystem1]

Hello all,
can anybody explain what mandatory parameter is missing or what is problem in parsing in next request:
Calling: SportsAPING/v1.0/cancelOrders With args: {"marketId":"1.114507325","in
tructions":[{"betid":"38923293567","sizeReduction":"5"}],"customerRef":"123456"
"locale":"null"}

Response: "{\"jsonrpc\":\"2.0\",\"error\":{\"code\":-32602,\"message\":\"DSC-0018\"},\"id\":1}"

Thank you for advising.

[onix250]

MarketID MUST be specified

[Merlin]

Hi,
looks like you have a lowercase 'i' in 'betid' - it should be 'betId'
cheers,
Merlin