{
  "manageEntity": {
    "action": "Save",
    "entityId": "1999654000",
    "entityType": "Track",
    "nonce": "0xa1eef5b98c3267b0522505dd08b733521369822470d6b573be9a63f6c6f8c7e8",
    "signature": "0x0653032860e8d8dc3db9b92215298eeb2145dc1c1e4429def3cdb5bb3558b72d1cde07326bf952a8c4edb999cadcff2de1ed4127a3a87dac0e3ef025437e6afa1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}