{
  "manageEntity": {
    "action": "Save",
    "entityId": "1772680825",
    "entityType": "Track",
    "nonce": "1793730519289047392",
    "signature": "0x1cc5cd29a67bd20a4720a4b3b494ad0a905ab7d2f25dc23d4de01f9a142cbf811b3db8c59a336abafbb74f4be380b94851d608f8acd2c95006b447748843389a1b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}