{
  "manageEntity": {
    "action": "Save",
    "entityId": "349901",
    "entityType": "Track",
    "nonce": "0x7294de328aa88e75f026e86bcce3c4e3bcec9641f175dea9c9b57c75d7c478ba",
    "signature": "0xddaa16ddd9489731a9771952281bf58d8458ac467bed849aaa7f0f90b34a959d612f9a78b370fef1b364c590449cf4a7182d24ce270e11ea2bb2d64811fead351c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}