{
  "manageEntity": {
    "action": "Save",
    "entityId": "889277057",
    "entityType": "Track",
    "nonce": "0x2d5a553fb25ef00213c99e511a82a103e24b8f52ae0efacd240628c3c00e992e",
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    "signer": "0x7D273271690538cF855E5b3002A0dD8c154bB060",
    "userId": "1"
  }
}