{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "78423",
    "entityType": "User",
    "nonce": "0x5e953c09c263d1943e48da3146b7a5162deacecb51499da51cede78326a16447",
    "signature": "0x1cea97ca5fb4673b619906c5f04df73788588af2a454baec25e2415dd5c80c865c6715766e026818623e1190d5e3a781d00555dc696fa48b74c258623402e6d71c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}