{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xbf7f18dbbcdd3623acdf996253c47840426abb4bd5921759343c560e2bcda00c",
    "signature": "0x7ba612ed7a24468f320433d665c5f903d86b623d14534a41fe5e516370d0a20327b2fb8168022a7fb410f949de850cb20f009afe9062bda37fb7eeacd92633ba1b",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}