{
  "manageEntity": {
    "action": "Save",
    "entityId": "541590182",
    "entityType": "Track",
    "nonce": "0x010df414be29227b12cec5fb5f843de41bb2889513ffeb49c2b144178d628445",
    "signature": "0x8d08df7f3ee0a9648f6b5f7e01ed0519def26a8e3e2dbe4e5b22c95eccfd3ad518287f03bd944da476f477a192f87c3d4042ec708ade657cc2c771414d378f671c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}