{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "646495279",
    "entityType": "User",
    "nonce": "0xb9bd6f607dd6199a19888077de0074a9eac844043232f5d929aa6c6cf6b12863",
    "signature": "0x570d7a7525d2b0dfd915cf2dd23b05eff5211c40a624bbd3f55ff5927fd5fa2123cf8e009194df1b2a95fb3cc7aa721431187693f52c34a20fb95ef8b517dec81b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}