{
  "manageEntity": {
    "action": "Save",
    "entityId": "348710133",
    "entityType": "Track",
    "nonce": "0x1aa019cb718219b86969e7edb1889273d552208b54d0af72baa99999b21984a1",
    "signature": "0xc2a92ae439045c65a12d376d8a3f0e9ed8b6c16f0d685832388d0e155384281c50362d807b08e1a2698883f42019bd75e3079dfc5b6681dc70b2f34d1cdc11871c",
    "signer": "0x54A7bEEa4225786D727D79eDe3df2AaB446aC63A",
    "userId": "757958666"
  }
}