{
  "manageEntity": {
    "action": "Save",
    "entityId": "1058680287",
    "entityType": "Track",
    "nonce": "0x3ecd17b961fe15f253b499ed5c1197fa787f84d1460aa5358f755af8cc946bcd",
    "signature": "0x647e339fd9fe8cf7037f18b27f25269c6ac164fd3b6d66f31afdda5525ae42100d9588f2a4d33e33dcfe5b31bdcec7808c3d36fa2fef5cc42ee4eee1a38f77701c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}