{
  "manageEntity": {
    "action": "Save",
    "entityId": "570373296",
    "entityType": "Track",
    "nonce": "1792424997745224445",
    "signature": "0x3fdb105bd5bf0d4d0c1297721fc753180a6a32f6d17e33f92bb7e3d3609cc05969d26e9dcd323effef2fc766c3aa9d449aad1b6439fabb4a64e44ad88509884e1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}