{
  "manageEntity": {
    "action": "Save",
    "entityId": "605852033",
    "entityType": "Track",
    "nonce": "0x7b349146da2c07c147c1b068f69026f30b14fff83ecf0f7ee6c29eb29a9efcb0",
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    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}