{
  "manageEntity": {
    "action": "Save",
    "entityId": "1373846169",
    "entityType": "Track",
    "nonce": "0x04b3571a5a8b9df6eb4725480c0a2ce0f0a43173cf23d2c58971b810d229225c",
    "signature": "0x8854d2150eb562655284c112b3cb529a82b5f8887057d94dea8a5568b278f10022daabd1c1984b6db45c6d293975142e886f33283453e38e0f5061c6fc4497ea1c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}