{
  "manageEntity": {
    "action": "Save",
    "entityId": "87752675",
    "entityType": "Track",
    "nonce": "0x4d606fe01e7f6dcf4bbd5020e6e2c41a7ed7a77b448740f3ffdd59f8362181a2",
    "signature": "0x902e8f7e76d16c30d8c90d27ca9bc1d67ddedfc15397ab6fde325c74c6827d1e0e8d6c3929dc3313782ea2bed0402163e087dc1f6a68599d5e4cdcb3d27008231c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}