{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1db4738219bc693354dbcc4545f085f4ed2614ef3201a93ca4bf38207eac4c37",
    "signature": "0x684308abec7cd5f0aaff004d25524d16f3041f4af92773fe363e8fbd4526d71a7e5747dd74f35ed370418f22be0ebc81976d3fd7c3db57e9aa09529a4264c4df1b",
    "signer": "0xBB3EBb593C10a429aA1a645297257dc66379B8f8",
    "userId": "534912172"
  }
}