{
  "manageEntity": {
    "action": "Save",
    "entityId": "1198324053",
    "entityType": "Track",
    "nonce": "0x28f7b579d135f1c2951d9467d1ca86e600c2417a86fede883f7def0ce80935ec",
    "signature": "0x45732e287b361ac064cef7360100428cd4dd842c7400955ab883c4ac93d34c554951b4b02e4afa7e154ee0c4eb1732fcedf573cc13c489b006ccffefdcd7645c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}