{
  "manageEntity": {
    "action": "Save",
    "entityId": "1937967819",
    "entityType": "Track",
    "nonce": "0xfcba2853003aecfe929a7ed9b2af743eba03f88abe993b0dcff774b21c0d7c7d",
    "signature": "0xec8c2b66f71025f894a8a25ddcd8144112250416416e3ee97b816a48126e79b0629a8cdcedb0746794e78267a68a0147eeb99c36b0005f9cf86e73a9ebc8f1541c",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}