{
  "manageEntity": {
    "action": "Save",
    "entityId": "1686644959",
    "entityType": "Track",
    "nonce": "0xaec4596b976287e1ae782fbb4a2a90a8192eea7fed73c5184c2d1e8911502377",
    "signature": "0xacc99a65f4f40d2825228c464114416e41dcacc3fd116262d55d99c4a4bd384e4a1ad1782551a400b1405dbcef0c25187a61e2130673e02e56a9cadc54cfe2fc1c",
    "signer": "0xF11F60bFb591E532d6E71E699ddfdfC58f377CA1",
    "userId": "458027684"
  }
}