{
  "manageEntity": {
    "action": "Save",
    "entityId": "1954170907",
    "entityType": "Track",
    "nonce": "0xdd4bb991fed551082cade7adebe0225fb1b28496016b6bf7a82a499238a67fbb",
    "signature": "0x8501e7ff6bbdbf9d7ac0cbf236ee381aa729bd652f29b3e38fa9bac3afc58d2d1dfade7d3ebac02d78b7ce0a01ba48b8053793a25fec06fb9aa644ed84845b431b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}