{
  "manageEntity": {
    "action": "Save",
    "entityId": "1673660143",
    "entityType": "Track",
    "nonce": "0x48e9ff6effd7b7f92fc08d9eb1b13d8ebd2af3f88a7b0dab73b4417ce31d67c2",
    "signature": "0x8a31f3294bcb6fd23696c2933bc14e7bb3d850415aa941b0d2fab7a82c2f606b761b59c463219a69592034d5ee0861779a2cb00848d92122842c2eaf864466b81b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}