{
  "manageEntity": {
    "action": "Save",
    "entityId": "1100706829",
    "entityType": "Track",
    "nonce": "0xfb49e2ee5821b5c3fe92e559de376b939e9b75b29a736b8bc662c03666137d63",
    "signature": "0x2d61695d19d16675a0f4fe6dca2d05d4ef2de8b2fbcc0273c33c87541944d7a66e4385c65e923cb0139387754367929f8123725f8edde365b70f8af492d242271c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}