{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089991432",
    "entityType": "Track",
    "nonce": "0x879e8893ba785abdd3754215fb06d8074e3604557faa5fa431bdb84785dc64cd",
    "signature": "0xb75c0ca1c02b833a5bdb0c3c7f65529930a8a6af30e210c218cddbc7fb9bb6da5b2fb78a7a8e0a750333f94856a7ff58a2270231fab5302059497304c89c4cae1c",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}