{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0c3d20494bd3050db87ce0a481b7c36de24bad85374e3bc9bbb77e085404bb31",
    "signature": "0x60987c437e357e0fcbc6f62c20d5c41d08cf5e1c8db47217b5ef29447af442f13671ae60d097c7c4081f9d0c57356dc6fb4a75637ab9cb2558a46d6f2e12d6491b",
    "signer": "0xa4DC46FCAD6f12C17d6901fADb3826C76aBF186C",
    "userId": "193463567"
  }
}