{
  "manageEntity": {
    "action": "Save",
    "entityId": "1366945317",
    "entityType": "Track",
    "nonce": "0x0341f492736d61416090c77b02a7557dfd3b69c5281bc76b1dd5a4d16c16d3d1",
    "signature": "0xf18f10582a9f8a4f7935e937fbfce17ab30328dbeca2101cd5252583b0b1c50721ce0e575a7285c999b430e50c2e0194e4280a3b41b57fa8b4bd1e75ed87b9a01c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}