{
  "manageEntity": {
    "action": "Save",
    "entityId": "1679262788",
    "entityType": "Track",
    "nonce": "0x1e30ab2de40aca6de471c438fee644610591b4f66c07fdd72d8a1094e493fea7",
    "signature": "0x56f7487f3e1ed2b102fbb811f13a6f4d0f67485207c5a313e8f0fb9feb70ed305432d5bfb5193bb55181ffa7524a4e1d4b89636b67075b5145b6d28f8ddf94d21c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}