{
  "manageEntity": {
    "action": "Save",
    "entityId": "410810",
    "entityType": "Track",
    "nonce": "0x23aa794f807fa4be1c768065c17aa484c9a0f5e4e2dbbeb82384508cd44b2969",
    "signature": "0x759a77ea1600951e0c9b5d58d54720f4da89fab1a199e86aadc2a63d05b645312cebbffd46b0e48eeaf1c0a39206f72207dea9e0393f35d25e9071d0ac6cf24e1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}