{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "663543734",
    "entityType": "User",
    "nonce": "0x133e1759d77a01a454aa2e175e4362d868cd2a9b58617e481651c286cc38600e",
    "signature": "0x4252ca15764276722150ab42216d55c1aff108cbc9ea03c044a5bc19a25fa9b712ce12e9d7013ad586eee5d37701e8b898e86f9816c215fd723c08e8fa00d66e1c",
    "signer": "0x5a7B3A7caabFa09e84C3700488a4e04ed2167BDc",
    "userId": "661577095"
  }
}