{
  "manageEntity": {
    "action": "Save",
    "entityId": "47467733",
    "entityType": "Track",
    "nonce": "0x18c6b59cb02c694da3ff46089895a1e47d10963b1441eb2fbba32bd1bc57f53f",
    "signature": "0x6eb421c8577827ced000b74b09f2a8a0c9b4a7adfe945222d4d53f24e16bddf51cdd12b50706144d0bd3caeb89b46cb15107adf001fb10052f419dfd411ddd0b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}