{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174112156",
    "entityType": "Track",
    "nonce": "0xd5316d52b76e18db470ea248e33812f1ec0a7c1038a478bc46ad1cfd4e27a37a",
    "signature": "0x561aaaab946cc6071d2e0ee2ce637136a7c0f8f95864065f3a6a5987dadec1fb1e6030f2b040edd36ca113ffebe8f95f4d114dd8a3504d5ede854e9fb1dce5711c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}