{
  "manageEntity": {
    "action": "Save",
    "entityId": "177195078",
    "entityType": "Track",
    "nonce": "0xf6ac68ece41ae363f658477f597ca329fdedc4d7b1c58a25f1d85e2657c28fa4",
    "signature": "0x024b4e572f93fbbebf0e5563be2ba72201ea248e3ec1e0cf5835e4481245a8a2012d711e1384be2b10b5c2b189803a29be7ba0ecc0ad19c3f1281e80d7f43d221c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}