{
  "manageEntity": {
    "action": "Save",
    "entityId": "126768",
    "entityType": "Track",
    "nonce": "0xa57e05fe92e04cb333a621705ead648ed7b65725fad1a5ff66955a68a73c1c00",
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    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}