{
  "manageEntity": {
    "action": "Save",
    "entityId": "575848234",
    "entityType": "Track",
    "nonce": "0xda2604703bedbfa6623596fe4dfe89bf15ffec1ffcc6d2a69ea6b8d2df1187f2",
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    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}