{
  "manageEntity": {
    "action": "Save",
    "entityId": "134328832",
    "entityType": "Track",
    "nonce": "0x151a359c3c4ef1da850fdf174d7e2cdd97c25b5b5eaf094ef18af98674648b44",
    "signature": "0x9d1d08baba4ac753bc2b5d183556c0c610e01583f6edddb320f4c8b47915434124686704f75be40e2f8a9a442eb02defe30a7706a1cb212b988b2efc47db363a1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}