{
  "manageEntity": {
    "action": "Save",
    "entityId": "1005659",
    "entityType": "Track",
    "nonce": "0x287432510b1ff33c650ea971d7c78dc79817fae1448a49ac1428b318315d9d69",
    "signature": "0xc8081956c63bf136f748309e902d53b9292289adebe6ad99348be6e9966665b249c3733a6cf5dbe361deae148edc03679497cb72828f6c9b1bb9b9ca8f2011de1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}