{
  "manageEntity": {
    "action": "Save",
    "entityId": "1663055811",
    "entityType": "Track",
    "nonce": "0x6a5a4785bc8d1fad6c3aced694b3e74caab3742e64a5ff032551df5fb46cabb5",
    "signature": "0xcb9e0f3e274e297033f1e0267973998d6b1af5a316aec6e83da844789933b3d74ec9e6ef5e821840394ee04c8faa62862331abf3d8d99dd0716fbc6f18d303c91b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}