{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054319192",
    "entityType": "Track",
    "nonce": "0x1e3095e9cd3d056cde25abc93cb8bef980cabd9448d3f463e0cb30e5e26aa321",
    "signature": "0x391b0a6009b0a01fa88fd11dc39a2f0144abb180422af56df4dea52309c82c486ad8f5818f66cc208b4b7684cc683af81f55e7884e1d7ee86366f8e0f3e464e31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}