{
  "manageEntity": {
    "action": "Save",
    "entityId": "1067856",
    "entityType": "Track",
    "nonce": "0x210b2856dcd115735776768aa043201ec636308eae7ae174c2e4fcae4e2aaf0f",
    "signature": "0xd2d21865f316efdc7ca870ae74272918f3b97ae8ace8bfd274fd67e4a6478c5f772b62c960903e62e8b557a0f5b0ab768e5e2515993776b2183f33c2b2f12e181c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}