{
  "manageEntity": {
    "action": "Save",
    "entityId": "1370154388",
    "entityType": "Track",
    "nonce": "0x97dff15d30310f777b8d4d6c6fe3b494d6be6c9df4ff693453867fb148924052",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}