{
  "manageEntity": {
    "action": "Save",
    "entityId": "1354840847",
    "entityType": "Track",
    "nonce": "0x3a922c1a79f474440682bea996c5e84e5ede88c2a2f97fa69c36fe3504f867e5",
    "signature": "0x7882d106f2567e740b1d25cc2f1854db28336ea47323617a795c29d8dc9623f32fecedfb5658a87904682863fd32754d022303332e1e75df616dfbc28e4e6a7e1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}