{
  "manageEntity": {
    "action": "Save",
    "entityId": "1318497854",
    "entityType": "Track",
    "nonce": "0x7fa93a881343cd8511d19c008ee48c7368321650f6f8c03430b7f15c5632be19",
    "signature": "0xcf6e9c71a8bdfed1299c0a532835b359081d9166e924c1f2c43e2383b07371c63095ee4962043cffca131e1b11e6d9887bb6797c45b31ea8f2c882cf0c55ea971b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}