{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1b2ea56652a526284d80cbd1943a4cea869d08a5a3a7aeb3edde2507e40b81b7",
    "signature": "0xcf9f0af40902f65b4c888f40de5b182cf27b95109cdc5d64a48b04a2e0f480d214035b15ef4698c645403f5695f8c1b7085f70d7c4a9ab4ed794ed600a3530861b",
    "signer": "0x1A81b9e556cD3FE98A741c33EE64C55cDA2FdAfa",
    "userId": "472536516"
  }
}