{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466983330",
    "entityType": "Track",
    "nonce": "0xc5b03848cad6d183586f52d84f8595324a4dce5abd3e800ffa74060fef41133e",
    "signature": "0x77f514b934dc29fd434a3ed323b65287198ec0ee58f4bff31b6aab98b2bcbcd9763ff632b3da35a52a7fecf6b0a4515ce6ceede6df148a233571bc59d76d01811c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}