{
  "manageEntity": {
    "action": "Save",
    "entityId": "264936324",
    "entityType": "Track",
    "nonce": "0xbcee96434e453f3df3a93941641f14e077421145294289538d1d01bb1efc4a8a",
    "signature": "0xad2e8c73c1f441625c0a8d0fde9efab4d60b8e8438201637d476579453b5d1a9081407b5f0551b5bcc8667a53674d214705c4bec2ef1f6239acb1cda7bb31b501b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}