{
  "manageEntity": {
    "action": "Save",
    "entityId": "18694",
    "entityType": "Track",
    "nonce": "0x4fb911b2429e34860b0c027f1d6083df9bc3f6bf39ae5a4cdb5c1abbf9c0fff1",
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    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}