{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "754648",
    "entityType": "User",
    "nonce": "0x6bd749e3e474ce7dceadbe947cb3e8044221ccebeaed023380d093d189402ecf",
    "signature": "0x2eef589327df2acba26d7ff6d3e060e056b1210d2203ceace4ce58d2c1d98bea79802b3bfa41fe15d98160c365ae7f733807f79df6a7ab957320d78987002b881c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}