{
  "manageEntity": {
    "action": "Save",
    "entityId": "1598198925",
    "entityType": "Track",
    "nonce": "1785738046865711063",
    "signature": "0xd9cdedd4be700e829ac2d73bb0cd5b37462280a2914aa1b9664a1559581a2e2d701cb9b353373f8feb524c06470454fd4f077c92db899e32dbed2ce84cf73a071b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}