{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456716469",
    "entityType": "User",
    "nonce": "0x2a76d0317da0e933a98fca52e3cb4efa788925f006cb455a6503195de9ee854f",
    "signature": "0xfd753abf91376e5758120d33e73fbdd50fab944b3b8c840f7513b5804f3ab4ef536b75b87cef6e76e9ed00159f4452e4dffa326dfa49e1286ee9344250b009741c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}