{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5a3a5f4aabc73c7701e13405e3628270e2560632307043be07e7721571a0a8ca",
    "signature": "0x5f2e9322ebe1cf23c1da26a689d8ab0529c8ed8e09d9b1b475365f307637aa001604a4b6c2f4ed12af89abf56e74dc2fd844e6d227b06529312d4bea953042cf1b",
    "signer": "0x849b8180f084363b37768C823c174C9786020A66",
    "userId": "817339612"
  }
}