{
  "manageEntity": {
    "action": "Save",
    "entityId": "2109048929",
    "entityType": "Track",
    "nonce": "0xddb397c1453d38b940c441040854737a1df30a7ed2825e884bd3a90e1e037005",
    "signature": "0x3f63fca71f0d7edfa060cc4ed2301487fb6e8b330b59900eb640fb5c949b52c8310f59497bbdf50d2787f30ab58dc36421e489cbe505d6a91398603afc00f2a31b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}