{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104404",
    "entityType": "Track",
    "nonce": "0xcc55fd433f4f67ccdc67c6bf15832740e8310431b37fb5d607b608ca6afe2c7e",
    "signature": "0x23c5b398b47e35eedbd41adb5a171573964da689dc3efd45c0a2f229313537b74f3fb550e5f2fae5386dc25b8035e4300692bd8505d6613e0fe2cd5a05a802441b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}