{
  "manageEntity": {
    "action": "Save",
    "entityId": "1687073008",
    "entityType": "Track",
    "nonce": "0xfa363011845c822c55a4d3544429e5b4250c74098cdcaab22526c4d6ce92661b",
    "signature": "0xb5a538c7a25ac85cfc6a7903168e33d1b8872a610ddf9e99fa3501e7c61603663319c124377c4bd03b15dc5069666629ddfcdd8edc46fb1568e86b42df9822bd1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}