{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900057687",
    "entityType": "User",
    "nonce": "0xf18bbf0c149fbd1b432fed474f86a034a29dc54222f49b23c167841b402ae0d9",
    "signature": "0x3dee610f270dc4a26f31e994ca059b9fd9a0a38d8d3d33100d3db52092d7298d1c7b0a24ef7fe4add269ed0859cac4b01e1a534254a072ec529aecb906ecd3c91c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}