{
  "manageEntity": {
    "action": "Save",
    "entityId": "832983866",
    "entityType": "Track",
    "nonce": "0x3b7ae1104383f229f8e8cf2f0ba1c0e9335f7533173cdd6b96a1323d916bde2f",
    "signature": "0x74bf77a125e640b1420e0a024c37450069d18073d20463661b19d9842a4fa10f79ec1c760d4048f8b54ad35c9f6d27bf4e18381a424840fb35fbb0958de7289b1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}