{
  "manageEntity": {
    "action": "Save",
    "entityId": "1679644055",
    "entityType": "Track",
    "nonce": "0x3544d5f7c7eaf679a1cf6908c72d4c2b21cb6846fd0865b9e4e05c8f8fa784d5",
    "signature": "0x12aa520a4e8a4aba2d8319baf4862ff4b2bf37f78f594fc2de33cf7fd169c9c31db776c8e0babf0f6bd922445642b921323a5fd0907618f1824ef30969ea04511c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}