{
  "manageEntity": {
    "action": "Save",
    "entityId": "1790982155",
    "entityType": "Track",
    "nonce": "0x7c57ca124a9ccb4a5419880db39f201d44b97c1610d897c1ba645100591a2ad8",
    "signature": "0xd6399b62fa60b896ac487644e650976cc2c9533cfa5b28753181dc14465daad36def37a8b966a0cba885e1e881807736cf3bccfb8d1835aafdca43231d7728531b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}