{
  "manageEntity": {
    "action": "Save",
    "entityId": "554447203",
    "entityType": "Track",
    "nonce": "0xa59eb23cb48b6c70138f0b65d37ae4f584b30a02c46f378e7d1fe9ead02ad488",
    "signature": "0x1f76d63cd112e25a13f95e30021a228ade137e2374aae49281c67543b1c9532a11ce8fb273de12546f10c5375dc7d739b737aebf87f6b03b1d007691c4d7e01f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}