{
  "manageEntity": {
    "action": "Save",
    "entityId": "190465468",
    "entityType": "Track",
    "nonce": "0x017c31ab0cacfdeb74f28169a2c4920b8537920f06075963a69723b265d0d2c9",
    "signature": "0x6013b1b3316617dbee11218005d2cdb3910eee48ae35a53669463096c56d926b5089c2a36c9d57f98b71ac6c6548540cdbd39348459ada43bb42d0b59b67af501b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}