{
  "manageEntity": {
    "action": "Save",
    "entityId": "1430980314",
    "entityType": "Track",
    "nonce": "0x71955ac9cce807c4c7d1a4a584ca63600384917e3c00837cdd74618862e56b79",
    "signature": "0xf9382bd7249d19ce3d0c7acac89d11d60f44bc9439428d47c96ce2e57e49ec27720d91374a9c8b2fbfb9b7edcaacb71d1f8d507dcd11e84a852c3ab5cc312e9d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}