{
  "manageEntity": {
    "action": "Save",
    "entityId": "234696373",
    "entityType": "Track",
    "nonce": "0x470dce0372cd8f4e17a73824dec6d1c372b67c5eecafc889053af69861479aaf",
    "signature": "0xb52c8eb39eff2eb8ad2911d6ccee5ef01331c011ce39a8baddecc8a08a2944276da7d4ba8d5a5eff69e3a684d0e23e9f8bc88e8b8985a78194a8b68d072811a61b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}