{
  "manageEntity": {
    "action": "Save",
    "entityId": "1651315051",
    "entityType": "Track",
    "nonce": "0xf63be111a23ba4ffd61061a9f3c9b5e9da329f4585c3bc8f3f441971d6d848d3",
    "signature": "0x782134e87ee5884ca634b5f550b4168fbde0ede6af9896a7fdc85a249fa9e8a72c41031d8270ec2e507800af0c4c7c9bae7d3b7f61ba12c9487c8c74461ed5c41b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}