{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285159092",
    "entityType": "Track",
    "nonce": "0x40536d406e62710ab6e0e7ada1ea0a6ed2cf99610e60527ddff5ea6edd7da006",
    "signature": "0xabdf46f7ba9faa7ce8ee3fa47b15ca8949a722df9298e5507819083269aeb7266e7c917e0b4689d09f57a12666d7df22aad0996c07c757279ab726371b4a9f481c",
    "signer": "0xeF75F84f7814D3Ec3cc021Cc73237B4A7509C21A",
    "userId": "505691367"
  }
}