{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18103630",
    "entityType": "User",
    "nonce": "0xd4b5bd56f0fa7dab8e98313114368a42e0eae49fb339e20ad6a690561a830695",
    "signature": "0x643b58f0d065a73b5840dcd87ec89faa8701d0f5beab0c44e46ce0a9546c4a5629b14b6f2043ee208f1d2f1e33f66120fe7282e0a78e76fcac6c2bc21fbd9f9b1b",
    "signer": "0xa483554f94b9C669B84049D8E78edb9e1d67Bcf5",
    "userId": "339858304"
  }
}