{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50672",
    "entityType": "User",
    "nonce": "0x32aa78589e41f3e9d8ec349cd9bd65ae2692e185831d5c4f0a1d7d5155324bdd",
    "signature": "0x9c88e6c0d04aef016f7bf2b3aa937ebea2324992114a5c8d5a7924dac9d50e7a392a897887d2dd4b123b16fb33e10043568d3535924105bec116b3b3148041a21b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}