{
  "manageEntity": {
    "action": "Save",
    "entityId": "413125947",
    "entityType": "Track",
    "nonce": "0x967d7713d85fdb8b37289751cee641b6a55e3602b82f6e13b205a39f86ce1098",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}