{
  "manageEntity": {
    "action": "Save",
    "entityId": "1300767789",
    "entityType": "Track",
    "nonce": "0xd741b058716623ffc70b10387107917c4974230894db8e5e62972167d1f8d949",
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    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}