{
  "manageEntity": {
    "action": "Save",
    "entityId": "864252988",
    "entityType": "Track",
    "nonce": "0x0be43709c510f23707a1066a0f2f938c0d8d4b2b193125fea391682b7fc9e403",
    "signature": "0x2176e92c87b8e3f958a5fc1de69fa4116a9c050af7f1131088777b6f87686b615edcfc42b35a2b65f8b56dba5ca3d406cc028d57708f829dde1020368d81208c1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}