{
  "manageEntity": {
    "action": "Save",
    "entityId": "1312765992",
    "entityType": "Track",
    "nonce": "0x7be1eaedccd1fccc88bfd05fb2488f619c878b84732e800a2bbdd6abc2c9d39f",
    "signature": "0x1da7ad0e8e3d62245acb51ce81bfe47e55f9a4607160692345a884a7d7bd5239692a09192fc4b6058dcae6cb961e09c2fa2ceae5d56d06bdc9b50a353b05802f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}