{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x42013600e56b6570eca6593d90430ec529f303622650e24983293a060e2f9fe3",
    "signature": "0x2cf60c8d82bf7ce1b7996041446e607e8ec4f422bdf3cf1d1f40c3e31c2ef095529ae07c76f83ef522b5b9e9b44f8e9ddb7f049d048caf363bd298ddbd55a79c1c",
    "signer": "0x6A409f4D8af22d7ecd049e1F789B2b7A2A090889",
    "userId": "528270205"
  }
}