{
  "manageEntity": {
    "action": "Save",
    "entityId": "436139881",
    "entityType": "Track",
    "nonce": "0x91e00d1f1e99fe13c1be28b57db0e2702b4c62ddd292ff6ef97ee723767d2b88",
    "signature": "0x4ad1d1ff8e0fbc9b172362361d632597b10a004412a30e6a6264e239abb60874570512ebcf5029b22d02228eabf372771fd2fe99c1be2f650b6915dffce1dbbc1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}