{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1221",
    "entityType": "User",
    "nonce": "0x817fda84b91b2373a7972b64e252bdf727f0b99b15dd3e3db404baac31dea09e",
    "signature": "0x178fcc55d8012d13dcb1ea9b867237b9a52ac1ec8b384229a815499ff4c41db27d51c7e3e54bf4ccbd88e2dc5d4e634c351d4b93d0bb8e1db8ed0dd23cef81da1c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}