{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x5f438b1054ab18ac69d1d83dc7bdd6b012482c53f9b887231300ddee07a3bd31",
    "signature": "0xc0d1bfa3d449b334e04e7bdf7166f136690f887d2bef032c5adfbb280e62fb8d473b8fb7622fd362e59033354ac2e2419ffc0f17f2ab38e8237799201eb17ceb1b",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}