{
  "manageEntity": {
    "action": "Create",
    "entityId": "479459167",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"cover_art_sizes\":\"baeaaaiqseaenjgrzjvilabsqfxligduv2dec327xon4yx4bbjz6cfyikpmrfw\",\"duration\":101,\"genre\":\"Classical\",\"orig_file_cid\":\"baeaaaiqseamyhjpzxwbs3bben5xfzqsfgabcy64p62szflptblxbxuppl6ogi\",\"orig_filename\":\"BACH JS _ Little Prelude in C minor BWV999.wav\",\"owner_id\":509651367,\"preview_cid\":\"baeaaaiqsebals5qohkmavokc3n7kor4rkeu23lr6q4olxm7jbsd6fwhjjjwhe\",\"title\":\"Jean-Sébastien Bach   Little Prelude In C Minor BWV999 [FREE CLASSICAL MUSIC]\",\"track_cid\":\"baeaaaiqsebprkzsrrwvbwjzttl276neajmsrf2r2ef7t3itbhscrrjla7zl6a\"}}",
    "nonce": "1787485679678194528",
    "signature": "0xd1bc7b94e7cc816ddcc5e7ff9011868fe64ab1921da2a12b1b3f71d3b2a0e79b3a14df493d7310cd26bd2e08157fce66f005a91559e1c2e608ead4fb169fcc481c",
    "signer": "0x8CB448A729Eca339BC72280C850c5479f5Cb0AB5",
    "userId": "509651367"
  }
}