@PrashantOn -
The projectedFields object shown in the documentation describes the response model, but it is not currently supported as a request parameter by the Dynamic Media Open API search endpoint.
When included in the request payload, the backend Polaris Search service rejects it during schema validation, resulting in the “Unrecognized field projectedFields” error.
At this time, search responses always return the standard metadata structure, and any field-level filtering needs to be handled client-side.