{
  "manageEntity": {
    "action": "Save",
    "entityId": "43533106",
    "entityType": "Track",
    "nonce": "1792422184709088906",
    "signature": "0x4115f30144c96f242cde5eb1ca6cd5fe1f250f4ab005b611ee55d4234728fee15480037d3225ef6783fb15088de65d58646bd07491d26da4bd267574f139a5ce1c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}