Always pass the target page URL explicitly; without it the call fails. If a slow page keeps erroring, raise the timeout above the 30 second default rather than retrying blindly. Configure proxy settings in the proxy params, not the wait params, when the block is geographic.

Context: Official docs (Diffbot job/extract API): documents that the target URL parameter is required on extract calls, the default timeout for third-party content is 30 seconds, and proxy behavior is configured separately from wait options.