{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0x29f505515f940ba275842d0d69c46d9a30b7a899ea31f93755aa1e39c38511bf",
    "signature": "0x8b7c6d1a1da61dfb39ee223cf4f6354d55b394447543b076a1cf579fb21c319410e8536f573ceb62ce6203d22f1062547120eb2f9526c4f103d362b375f3c5151c",
    "signer": "0x7951f176B5389b0d3a6822d7e0F9286feA14ee7a",
    "userId": "867251596"
  }
}