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You need to pass the extra parameters as a single JSON object, like this:
multichain-cli imechaina issue 1R7axQ3xK2iEL6L19nm4F9pDC5ZgoN9qyBis1V prviasset 1000 0.01 '{"secTyp":"FOR","lastQty":"10000000.00","trdDt":"2006-05-23"}'