{
  "manageEntity": {
    "action": "Save",
    "entityId": "609772042",
    "entityType": "Track",
    "nonce": "0xa5e29b95cc75f5deafc46f8524186944dcc96d43d1ca118e2df6e6b6054ddfbf",
    "signature": "0xe02b8b0f02b369754e15e9effc3899f2662131ee7f035d00b16ad376d27e2f0068632ab92f992f90cd7371d1281d25fad2160cc196c1d91345ebb7c0ab124cf91b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}