{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "494564988",
    "entityType": "User",
    "nonce": "0x306f95e6067909e4ff0769394e2a3f1a339313c384ec06c781d7d25e4f5f3986",
    "signature": "0x5d26aa9aaa5b8f9f2fff7b553611761c67d6d3e0643774e5221225f0a64e442e3f442520f580019674b0b256395912ada3c3086db928d0025f7622f1fe903d1f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}