{
  "manageEntity": {
    "action": "Save",
    "entityId": "399307173",
    "entityType": "Track",
    "nonce": "0x4cbe88cab02c7e54cd388cd0a3eb6b19288dec86c939b4d5fb96c686fc6fa30e",
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    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}