{
  "manageEntity": {
    "action": "Save",
    "entityId": "1282436184",
    "entityType": "Track",
    "nonce": "0x52350e8bf1ca996f330271047fa18bf1b6dee876c9d157267ece0646885b51ca",
    "signature": "0x40cfd9294b9a029469fa5894dedc226a9da9aef5ed130f47da8d8bae6e7948232af6c0cdeffd89e2b2b7b4fe98faf6dd14b3325c002ca09e7439fa9c4edc87341b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}