{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x15ba92dd50610c9f29ed1c0458503b2a6c4f9e8a3154a84c1901eaca8428ea81",
    "signature": "0x70ab91c2880fa97fb3127073b2aa39d3b5aa85b8b04a8cd5f3bf1251e26fbcd42b8299ebecf2b14829773bef2ec798e1c113a5b60322b1956f385a2af04f57321b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}