{
  "manageEntity": {
    "action": "Save",
    "entityId": "370236625",
    "entityType": "Track",
    "nonce": "0x2ff7eec9b164c5178ce1cef5ecb6c289ccf9bb2abe7aad5b14e6295a223551b0",
    "signature": "0xe9d95beccf7cd7150bc751489634e51f7b6489d5eda3d7660c834c897bb432ae2ecf92561df2ae7da76be30ab33d3d8f3dafad2272c93135906436b473dda6e91b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}