{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8eb52e31cb459037b5a9cdf281a56cbba757ff5546d54307073ae28d5d0fdd09",
    "signature": "0xd21dfaf22578d98b91898f2f549d193d0ecb6369ab9b4e60bd866312cb47bcda52c7a2ccbc9dfc808c4df8ec146ec40725cb1fc7049e7ec92265eb8e994d53591b",
    "signer": "0x9FA61Ea6a57cAA57a0FBc08250a84C3b6765c9bC",
    "userId": "298768416"
  }
}