API 400 on Shared Flow Invocation in Architect

Architect & Flows
1

Can’t get this config to load properly. I am attempting to invoke a shared flow via the REST API using the /api/v2/architect/sharedflows/{sharedFlowId}/invocations endpoint. The request body contains the required inputs and context fields, but I am consistently receiving a 400 Bad Request with an INVALID_INPUT error code. Here is the payload structure I am sending:

{
 "inputs": {
 "callerId": "1234567890"
 },
 "context": {
 "flowId": "abc-123"
 }
}

What is the correct schema for invoking a shared flow programmatically in this context?

Thank you.