{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "406225571",
    "entityType": "User",
    "nonce": "0x28a699ae3ec93bc2ac42e0b9419c65c7e5d0f0ec89928f6ef0b791c0bf16190b",
    "signature": "0x6601e5d077c27b4f9b9923bd225e33f32b1d158351934f3fe7486fc417f1f41026bba1f5c1487a89f95fa54762da521b20946a4b0f3bfe84155002d0992d95c31c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}