{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "637066952",
    "entityType": "User",
    "nonce": "0x143b416cf3cfc3709a2b44200130a81c7f4b202a34980fa60eba1c7f7c440274",
    "signature": "0xeabb5c88192f7f6b71bda9c436974f98a8168a663b9b21d89014f6900043828b12cadc46e39bd58541e9026ca8533767e6b626ac1ffbc35faeaf3b97b95a491f1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}