{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x87a7068b46e7f3c7bf33d83d1520e473c2a8561828bf03bc982be891c7f0364d",
    "signature": "0x40ee9f4b11e096bf4d0a6834a10e354b4641d10f6be99b7f9bbb9d8f62a1f9c15e51dafd151c260ffe1df0a5333e4c19e54819e31ee53f3cd1c8f5371cb4345b1c",
    "signer": "0x8E527526b8D197B0e89F101f38e313902fBFa7f2",
    "userId": "339034760"
  }
}