{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7ef2c11ffaf8a9fdb879a2fe5bd6335756678f528b6e9c2f2bf605f47f5ca69d",
    "signature": "0xd30ed62d7a78499c3611f4970d727eab99b3e915e7024bcd94206395c2213d8a3b75bdb6baf707654391f8e61d9aa6a205b8946e7affa53598fbfeb623fd25151b",
    "signer": "0x661DdCbFB815f83B5F910F6CD87e6ff623BE87D3",
    "userId": "345473478"
  }
}