fix: Handle null payloads. (#497) #1583

Job	Run time
contract-tests-curl	3m 25s
contract-tests	3m 47s
build-test-server	6m 44s
build-test-server-mac	14m 34s
build-test-server-curl	8m 31s
build-test-server-windows	25m 30s
build-test-server-mac-curl	9m 48s
build-test-server-windows-curl	28m 10s
	1h 40m 29s

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