{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "342949855",
    "entityType": "User",
    "nonce": "0x57e39d9ac78c07802441ced9b5b11745f4a2cefb192eaac57ff1bac30fc7871d",
    "signature": "0xc91ed9cf57e1859331b031eb8cb3b3014924141940c808c0c9e2e1649d7128113e036a2613d7e497690a6ba0bfa82b17a27338083cbae07ec12a11cdb6889ec91b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}