{
  "manageEntity": {
    "action": "Save",
    "entityId": "1659884162",
    "entityType": "Track",
    "nonce": "0xedf86a6e72f4b0c7c96cbb9bcbc704e8bf640c475eec5613ec13993824ba2faa",
    "signature": "0x1aded6f6a361401c716ec8295b9b4461a1299cfc87aeeefd9fa100d1f79437916fd5fa75ad7d6c82c2507b9dffa973d13c10a6da3226044a611b590bd69f111e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}