{
  "manageEntity": {
    "action": "Save",
    "entityId": "200147",
    "entityType": "Track",
    "nonce": "0xb732d0a43f4f1c4122d4cf59475968503e243158379bcfd915544eebca6ba14f",
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    "signer": "0x990Efee96276569Be96c8776E58B60Eb951DA8f8",
    "userId": "67349"
  }
}