{
  "manageEntity": {
    "action": "Save",
    "entityId": "1974016758",
    "entityType": "Track",
    "nonce": "1791997106181495917",
    "signature": "0x2ffce6a5f1121d3e4984c75b673f0edb39086fecbda9cfc66032c0af5a1afd160d57030434b9e5ef81709167c0a1f3d1f4693380b7b74c6b7bb606d717aef8b21b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}