{
  "manageEntity": {
    "action": "Save",
    "entityId": "871872863",
    "entityType": "Track",
    "nonce": "0xdffd255038b4ea0da5d0035620278c3d2702a6a4e3784123b0f17e0a983cb2e3",
    "signature": "0x2057315d6ffeb5b1d461ee63ecc66ef6ed46d52a46b0af4de74be1ad26247419367f5e5bf852785d1f6dab7d3b2c29d33120ccf3689b30342735220fff5d34401b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}