{
  "manageEntity": {
    "action": "Save",
    "entityId": "623053210",
    "entityType": "Track",
    "nonce": "0x383251c3973775eaa12dab6cf17d5b33c71dc405e19547eeebaddca79c5d2fb1",
    "signature": "0x7ab50215ec02ea50775758a7c046eb44edf873017b17edc49cd2615747de4ba96b92380eb164e98a793274d70110bd2d14d55c9d8466ebc296ea26f90881cd3c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}