{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098846257",
    "entityType": "Track",
    "nonce": "0xeeb1b647beda8c9addf6b056052ebb8af07ae8e32905ed27e2aa3f332fbaf4fd",
    "signature": "0x04da6c89fe7920d6ecb9d9a297267476d48dd65ab316b1336df4a42659804392180836e715aa3ff61ce859a683cac3e440ecafed8118d1f547757ad6667464151b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}