{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd1578ee2054ee2102eaec11f465c4610bccac5aab58e8a985a5a5af66009d80a",
    "signature": "0xa1bceb3c95ce65e6f3cb368bbb2fa9833ebdb6149132ceeaaeed7484427e33923d2b6fbc8835e133baa4ff590ef2099a4129c3b336bec85037c890f8c471a6691b",
    "signer": "0x716E7A2FF214B0ba1e763f43C4837480dBEab829",
    "userId": "904851549"
  }
}