{
  "manageEntity": {
    "action": "Save",
    "entityId": "543606",
    "entityType": "Track",
    "nonce": "0x2af2cf8705f21fb1fb5bcd43d84b1588c04e5297697c113fda4d70fd7342b4f6",
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    "signer": "0xAD614C578d791AA2538Fbfde30C97c8EFb69756d",
    "userId": "906447444"
  }
}