{
  "manageEntity": {
    "action": "Save",
    "entityId": "564894",
    "entityType": "Track",
    "nonce": "0xd7e7a742d63f3819fbd05e9fae736833e31d0d5bf33ff0660d03cdf15a9a4e06",
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    "signer": "0x4596Af3c2C6431486ddFC282464aFfA4d54a3845",
    "userId": "10241"
  }
}