{
  "manageEntity": {
    "action": "Save",
    "entityId": "95497770",
    "entityType": "Track",
    "nonce": "0x76e7cbf5ae66bdd8459ab3d19304520ee8dad372a2e47f582f8de131e8e83495",
    "signature": "0x377897aa74c7fbd1da4552c3e0cd81f0d5db0ef7a85ad5740f241b26d8c074077b61dee44f9e50f98b8b450338c3b8ac72f542aa28e64319537cb454e9ed62761c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}