{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646754179",
    "entityType": "Track",
    "nonce": "1790010883948750061",
    "signature": "0x3d4f7ebe05d601b20606a7bd2236b5067b2878582e8b8b1bf6203e8480bb2a3121bebe4d8bc5062ff76e9f4ed8cbb208c68edd77d35ebdd065112f067a9f12651b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}