{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "774209",
    "entityType": "User",
    "nonce": "0x9e3d69718003ef5a8da873cfaa64cd8e757d7dc63b547153c23e65a4d267c015",
    "signature": "0xf512ffc7494979efd71f5faf01088cb1c8c3cc52a2400db4a1926a87b73fe0b109d226ffda818b6ade8f22027b91f68fb53761342d73bf17ffb94f1fefad944d1c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}