{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249176573",
    "entityType": "Track",
    "nonce": "0xab5ab71e0c422148b902cb3babab65d2adeb472e932fc7f4a5a649789fd378ae",
    "signature": "0xd28503e474125876ad3f5e86594809f7481b7e08fc1e0344b0e6914b7a4660180b594eff4fa8ee3ec108031a1225219eeac6ca7e8558322d0d387d4509bf2c851b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}