{
  "manageEntity": {
    "action": "Save",
    "entityId": "53072598",
    "entityType": "Track",
    "nonce": "1790056224967716654",
    "signature": "0x547fdde9fe6e99cab6fe13e7d32ca72d229611cd63db89b5712bfbe0f6716cca7884b487a1732e9ac585be653f1d39d35f5fea492bdca2e599f8c407cde5ce911b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}