{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x75ae380e080d786e49beef5d03ddca35f6d69248f0f19053305a061c86d3b6ed",
    "signature": "0x534910f530f9c8ab2da76d46aee94963afb4f3e76ac83824a36334b6abcb2e687f10d96e6a1fd17a61923de1bb647ffe95f1ffa3f0cdfbf682e17cbfa4e944f41b",
    "signer": "0x3F595cc9681E304c2Beb91BDEaD7E4B7c8A99caD",
    "userId": "377016458"
  }
}