{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674100361",
    "entityType": "Track",
    "nonce": "0x1ab227f4bd8aeca7d9758be57ffeede637ce875931104fc4cacaa8c168b66fc9",
    "signature": "0xa9d805a960482fae218b072a8d1a7ef6094d5681f2eb97041f85a17039376f9f07c632d83b0e3ed510fbabf4b18a6c809fa7514daea31d939a57eb1613b0d8e51c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}