{
  "manageEntity": {
    "action": "Save",
    "entityId": "179643445",
    "entityType": "Track",
    "nonce": "0x1d2e7e278fc2d9df9a0068b1bbbff48d8d8caf366556c26ca85354ae0606e495",
    "signature": "0x085b73c06fbb759eb667f41c814a996e711c46dcf06d2a16c7fa70b0a3b54c5a29b4e79e568d954206c093ad876ae232e05f1e3eace9579bc7ecd24d969e2ff81c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}