{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810374381",
    "entityType": "Track",
    "nonce": "0xfcb24331365981c86873715643f0b01cd7730093ecf95442f30ecab6b1193686",
    "signature": "0xa26a3b25eb8de981ac6f64c8e6697e51d90adf4b3e7aaf802bc9a1b9e6d3db525f3ccd10a6cc94754c4b642e21da2dc5c0282555941c614f41eaacb77761da211c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}