{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4909106b9cb5412de930a14cf15a165fdcdff1276596c200f96c7dd134d5e885",
    "signature": "0x9c4db41ad184e28aea7faa0f66cd2a5a8d88d25235ac48fa77c461f0646215621fe2a7492bbb2d756a7ec919ab245678a5f814f1123774aaa16e87cd67f565161b",
    "signer": "0xDeF7b7Dcc18B5220d812AabBC02a919ac473db7E",
    "userId": "290369133"
  }
}