{
  "manageEntity": {
    "action": "Save",
    "entityId": "867315073",
    "entityType": "Track",
    "nonce": "0xe6b110fce817d7ec93ff6567c29f4cf2904c6afbcc51c9db4de903e2c375c394",
    "signature": "0x3275fc2a6d656f55dffa4ab8c616cb53e7ac9921e21af92015375873daaee25105d516c4af5c18bd333aa787900f66756480e8ba7949c485d29473e21525446c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}