{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "678556080",
    "entityType": "User",
    "nonce": "0xa53bdbc7118fdf450ea50313d046c9146786bf53391bda54bbd3582b61b4c329",
    "signature": "0x853981d6b8cc2cfb3f960385e351350618a27f7f0b54d40f9742f752b57df2f658342838a76df199ed017321be733e911d73026f7dbb8b38a314a4d8d0129c811b",
    "signer": "0xa3C91a44f620f0b95468bEC359f89edb95AE3cdC",
    "userId": "904405512"
  }
}