{
  "manageEntity": {
    "action": "Save",
    "entityId": "485804709",
    "entityType": "Track",
    "nonce": "0x89be58cebb259c7f791818a5f7028d3ee566b9d57849d1122fffed9253fa9358",
    "signature": "0x1068c596f5fce6111a500222562b4eab3bcf7a106dfac7c4505b9f9aaa2f61e75658a276292e4fa523a4a963e4ea71b657a4dfc6a0d536ebb2ed6217808a27db1b",
    "signer": "0xC08bE28cf05cBcaE3094E0FbAbfA61ca8Ad61dc1",
    "userId": "190259218"
  }
}