{
  "manageEntity": {
    "action": "Save",
    "entityId": "1841121681",
    "entityType": "Track",
    "nonce": "0xf9cf4761725d42e3fb51ed84efcc8c287f3c4950900709c3794cbe165011922f",
    "signature": "0xd67548e3d289842c8abaca32f34aecc7780a21b47ad94b224a40b35482a994251b3ce124c1c77760bc06241156a5e79e88ff9dd03d96f92240a0a3b9121c3a3a1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}