{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123688",
    "entityType": "Track",
    "nonce": "0x7555b7e46fbd485cee700e6e0a9f03f672cf7b4f4044c2529e1cccebcb72a1fd",
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    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
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}