{
  "manageEntity": {
    "action": "Save",
    "entityId": "803279754",
    "entityType": "Track",
    "nonce": "0x0d8fcff796cfc2d19f0ddc3fdca5f115db965d12c78e6b9ce1eddfa3b2c28c26",
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    "signer": "0x9e28dC40BF975c92B3D575d5b719850167D30fB6",
    "userId": "606506732"
  }
}