{
  "manageEntity": {
    "action": "Save",
    "entityId": "989974",
    "entityType": "Track",
    "nonce": "0x1a2f88b494bda0703c229e75d16c9292db7a065fdf3fff7fe08415bfc21c0040",
    "signature": "0xd236d82988703f8c3d7abd443566be844c101605982d6d5bc3985528de7d699a376a1c12c71ab144a6637d81338bee3ecc8a166cf9544d17cd43c97e5ee528c91b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}