{
  "manageEntity": {
    "action": "Save",
    "entityId": "322073390",
    "entityType": "Track",
    "nonce": "1790791595736127719",
    "signature": "0x88142cea08055f285bfbc7371b33791cea7efbfa18d42f56e8c56eae5b0567a05fbb6ad660e9e80050b54c709e21cfb499b08f2dd6db368479ab66394b30a5c41c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}