{
  "manageEntity": {
    "action": "Save",
    "entityId": "53852",
    "entityType": "Track",
    "nonce": "0x126e36c77b2c4535e0864f27d0a090e86753c013137fc4557a0eb765f66c38b5",
    "signature": "0x571b63ba2fdcbd98a8e7e76da8ac7684d661b04e40f80f1b624fc3ce4fc5103c453a915be88fe4ca90fd5bda6c44b8fdd5acc10499f3aa782ffb3e97c908ddd01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}