{
  "manageEntity": {
    "action": "Save",
    "entityId": "1049015",
    "entityType": "Track",
    "nonce": "0xd753877ec60303fa994eccaea55ff4159b5da62fff197deb3873ee936a65e560",
    "signature": "0xde960740ca03856b9710101a1be9a3107879632a19c172af562ac3c5180ac8f63ec5a74230981869f2c3b5d3ce2d67f5bb3fcab0b18c1522c5929a40a0357d911b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}