{
  "manageEntity": {
    "action": "Save",
    "entityId": "125095",
    "entityType": "Track",
    "nonce": "0x2658e532396f0a6400ca83a44d486fc151337f1fec5929c35de7d320cab2d826",
    "signature": "0x27181741434a803309e031d80f37b32b1b208aae9a53e2c367dbdff5087b034634d3238fe8bbe9ca2bb19fbe2a5d768e62bd61ac625754280afb8a7f75f4559c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}