{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408355930",
    "entityType": "Track",
    "nonce": "0x9c1734477d06a8961e992a13f890a609ae533c46d142aee3d0333b84bb2c4851",
    "signature": "0x93aa7a6f17d5ddce3c3856824f73d2ba8cce0929aa42a4512277acd1241904a70c2483dd6abe0e30c8fe7e6477babe92b6462aa8d470e74f66ffb59aa339f5961b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}