{
  "manageEntity": {
    "action": "Save",
    "entityId": "206958384",
    "entityType": "Track",
    "nonce": "0xd7753eb6f05e69c9f8f6df58d8d88ca1a4b11c84573e19405825bb302d99088c",
    "signature": "0x0475303abe8abc537023c1fc331bbfb817b8f6b2fa83466dc1d71d5cd732fb715f5b6135e0cf7f7be204f40768d43af6c7080bcd907f170c92aa93dea4af0cb71b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}