{
  "manageEntity": {
    "action": "Save",
    "entityId": "976089",
    "entityType": "Track",
    "nonce": "0xee790b7584cd0d1ee188c183ee2ed6e8901fb3ee379dc968ee9f4a47b0054ca8",
    "signature": "0x150df796d78d482b4ef22dcd95c0eb20d80343cd80445de4daf56f48eda8e9ad7bb857e3f1aa8842ca1165a6a3a79d3b12e2f790e5879938255f24fa66ff1c831b",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}