{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235306629",
    "entityType": "Track",
    "nonce": "0x3a3450d52f4a948cbc5346c24d6880334e161b80eb927cf1723ad1e7a4dfae70",
    "signature": "0x25db781c5c9dfbc7768da20825f838f041a00be24b3d4b38774871179ca2cea04760114db69ea7f5a93bb86bee72641dcf01c1fc7492c7e0b3225dba12c5069e1b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}