{
  "manageEntity": {
    "action": "Save",
    "entityId": "267881",
    "entityType": "Track",
    "nonce": "0xe09078a86a494d36b292e8ef28121a60e9273af077a4672411d8775d0befbcdf",
    "signature": "0x77c80125fa1399aa55853ef58e23f9235f6d13d316dd2197154a801147fe504c5397ee77a9c4ddf00a12618c2e6334ba3a15f38fa015f65930fa3e2c0266ebe11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}