{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7f556c3686858c39336f9b4278884bf4b47e918a27e0d2964c479309a50ed0f5",
    "signature": "0x03d904134d64aa5995ec9c2fdb54ca0d3c5096796bd5ddcfc666e846f02ddb191bcfe00e247725d37c73b7e48d4685a9210393324132d7f14c9185cca8f2b09b1b",
    "signer": "0xDd9810f0cAd8324C6052161344AB97927c5E211e",
    "userId": "373597673"
  }
}