{
  "manageEntity": {
    "action": "Save",
    "entityId": "722738",
    "entityType": "Track",
    "nonce": "0x9d3a70f8a91f81a366cf06a352f8ca1848498b4cbf9d8be850e2a70230e488df",
    "signature": "0x1019238af212040c5be9deec53f303f2ba131467dfa706b00148b1ad680a3470521c32463c4f8fdcbfdc62a1d5a7294a9333d20cd1601f6b79e317906ee0dfe11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}