{
  "manageEntity": {
    "action": "Save",
    "entityId": "1350677148",
    "entityType": "Track",
    "nonce": "0x56a87a193b8e348b2f76ffa1d279eb5f36f329d55b62e89d6a286d4362ca64cf",
    "signature": "0x6aff37d570ad48bbea1e5a594d6006c1d95567a0bd94771e4544ee2359f5c74060eb9ace91fd525cfad2c27d9fa2348728b1756f003f4d0b96953ef3650f5fc71c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}