{
  "manageEntity": {
    "action": "Save",
    "entityId": "818282655",
    "entityType": "Track",
    "nonce": "0xd888daaf12e9648311b4425e33b08df69c59bf4dd1fe5d2b8a99b206ac88c1b5",
    "signature": "0xe84d1870f5d751453f2dffb4ab2b7815b1473b5b34b0e6dd80f13c41c6c8b8146beccdade79a3622f0c08e65dd590a2c3b05f6ab99ec5268856d4a9bb24f736c1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}