{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "603183494",
    "entityType": "User",
    "nonce": "0x52fd203fe7838b6f38a533cb49ee8aa20749d4a1673dfeef624e69f6223c9767",
    "signature": "0x1f02bb0f9c051eac6a3f81f6351cee09335c7fc4e41ef572161f8897ae8023991b502676f27db8c4f15f023bcd947fec289aa7a81c5b937bc30a9aa720f5023b1c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}