{
  "manageEntity": {
    "action": "Save",
    "entityId": "924533970",
    "entityType": "Track",
    "nonce": "0xdb57b5600cf3cfc639339a3de827b34c43390af50274b92dbd5b23bdfa35aad2",
    "signature": "0xf1f2931f70f9e9a5b4d1b0e83b0b1003d4b0abe503e0fb13fce46a5f189acdb20b4bd82119e2598d8edc7ea439f206de55cc30974c13f5ea0501a98f6aeba47a1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}