{
  "manageEntity": {
    "action": "Save",
    "entityId": "560333",
    "entityType": "Track",
    "nonce": "0x8120a0ca3c20ec83db74b0173db78e861e6dcb75aff8c32f7e94ae69370c0427",
    "signature": "0x4ca3dc84fd3ac0af87c643807c7c772388648f3a931ff25580edd0ea009c84af564feb330211be18975d7261b9efec7bea71cb087f6c21cbc69c4e3ceb900e2d1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}