{
  "manageEntity": {
    "action": "Save",
    "entityId": "88974929",
    "entityType": "Track",
    "nonce": "0x443d8dbe506012cf95b9af94c0469e5d25f198ea7eaa06dd3ddb87ff5d654968",
    "signature": "0x272ee84e4636b27b16914f465bf57ab2011fbb4ed0868688f6d0207eb75c5b060f4ba0b6d49f7293989d724d9cf1c274ca7e7e8ce13f3a6fa9a652aab523747a1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}