{
  "manageEntity": {
    "action": "Save",
    "entityId": "1535964222",
    "entityType": "Track",
    "nonce": "0xdfb67540039dfe46b4978ceed90638fb2d343a5627978e1ed7f7716e0c960259",
    "signature": "0xf76b24b8233966d0c81adf34c1f1fe018842f9ca7e3a8162df707c786a8e46184ba551ae4cc6fd69374386c23f3f2a020a3b592bed3e6a5421563bc369c704431b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}