{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x28465d312c1701ffeab2eb46d2ca751f340c821a85d188b9696eab3153965c46",
    "signature": "0xa650b5afd08cd3451188c5ceceda3dabc05f59523adca822dd5a3a4b4dbbc2f40a532d1bc3bd7c5e1e8487c4dcc6088036061a32b1b96bda47175ef51b6f5cf91b",
    "signer": "0xA525425e318Cd1b79a7D3Ae17ff37Cd2F20C8CC6",
    "userId": "77256302"
  }
}