Unable to pass rest request body for establishsessions

Summary:

When passsing body as this

Getting error response as

Document i refer from https://docs.oracle.com/en/cloud/saas/b2c-service/20c/cxscc/c_chat_establish_sessions.html

Content (required):

Iam trying to pass payload sessioninformation to establish sessions and iam getting  A problem setting a property was encountered: not an object; EstablishSession.SessionInformation 

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