{
  "manageEntity": {
    "action": "Save",
    "entityId": "616643674",
    "entityType": "Track",
    "nonce": "0x0d73e12288c026354327bdb48be8158255f82a06614f6b634081a58f2d4b4e97",
    "signature": "0xf2053aaf4c3a5536b4aec6d114e0667adcf6e900681f3d545455a6ff70626a3a29d821ad59abf58b5554aeca318634ce2d2fe8dedca0b64eccd0e2466a4915871b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}