{
  "manageEntity": {
    "action": "Save",
    "entityId": "607138502",
    "entityType": "Track",
    "nonce": "0x9eb283ae08259bbea00023d8a92274d40d9a2e41f3341c00c020f32ece57835d",
    "signature": "0x47f51db13c9bd926ae4f3010de58b897d2fbbe0ad714d16911e1ede1f11b70006a95871fdf238ea709dc5350c84bb1279556f78c492850f005690fd4cf7853d11c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}