Changes to Search for tracks

added the new optional query request parameter is_pro_free

added the optional property data/items/assets/waveform_json to the response with the 200 status

added the optional property data/items/contributor/name to the response with the 200 status

the data/items/duration response's property type changed from integer to number for status 200

api operation id searchAudio removed and replaced with searchTracks

added the optional property data/items/assets/shorts_loops_stems to the response with the 200 status