BassBase Parser

This tool parses the BassBase API tracks response into a structured track list. It accepts tracksPayloadJson (required, a JSON array string of track objects), sort (optional enum desc or asc, default desc), and limit (optional integer, default 20) as metadata. The worker must parse tracksPayloadJson as authoritative JSON and map each array element into the tracks field of the root output object. The final output JSON must strictly validate against the system-provided structured output schema and must not include extra keys or nulls beyond what the schema allows.