Only few points to notice:
1. "role" field in "approvals" node should map with role Id, which is "Sender1" in your case.
2."approvals" node should be host under the "documents" node.
Our new API Specification site is up here, for your reference.
Duo
Duo LiangOneSpan Evangelism and Partner Integrations Developer
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Wednesday, July 31, 2019 at 06:55amDuo Liang OneSpan Evangelism and Partner Integrations Developer
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Thursday, August 1, 2019 at 02:05amDuo Liang OneSpan Evangelism and Partner Integrations Developer