{
  "manageEntity": {
    "action": "Save",
    "entityId": "471238933",
    "entityType": "Track",
    "nonce": "0x4f5d59cc84446c12594c7d66790a742ce85704d90c2d84e3f4c1064906d0c725",
    "signature": "0x3a4a9ac67cb8c757424ebbee72fe668b48ff99f437a705b92228f80f00162c2b0732283aab12bcfb2914bf4157591d097e189f5f581c882d23fcf97c1a3587261b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}