{
  "manageEntity": {
    "action": "Save",
    "entityId": "2087666010",
    "entityType": "Track",
    "nonce": "0x5f86696fc74b34720980e67df4e5d9e3b817022ccf2aecca5346214c34650090",
    "signature": "0x8e116b7a9b029b4b4ed764f16bc256ecf567f0cb5453424dcd79a0d08301aac12f90c69faa758af5d16954ee88d45226dfe981ee957c8e33250f8978821f3f7c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}