Calling a service connection end point from action to assign a variable

Summary:

I have to use a POST request to perform getMany. The response looks well formed but Quick Start will NOT. recognize

Content (required):

I have to use a POST request to perform getMany. The response looks well formed but Quick Start will NOT. recognize recognize -- the service endpoint briefly shows up and then disappears. May be POST cannot be used by VBCS for getMany? So I tried assigning the response to an ArrayDataProvider, assign it as data for a table and populate the variable in a life cycle event. This service request goes to an OCI NoSQL service so had to be signed with 1.0 signature. I set up security so it always uses proxy.