{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359469525",
    "entityType": "Track",
    "nonce": "0x581a4932b34caf60bb9f412d965f2e54398ebfb35e411c7cabdcf2bebc14dd02",
    "signature": "0x68450ea9d52abc1472802ebbc997bb83df8621e5c1628446e06ccbf04e0bbd4b17a5a026a66b582ab4ca8b5154fc1681ee498d082efb4706669377db892db7481c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}