{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42216",
    "entityType": "User",
    "nonce": "0x3b4b3712f2b5e964502ffa34b5a32121b0016a40a041a40b8b0d9b3ec7774508",
    "signature": "0x596eade47bb9de81e0e1c550ef57c102b45abfcddd702498f5e575616d8e5ac52b8cf3b8170d02c6627663147502b8eef7403955224f9e58f46a5206d31007a51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}