{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "840316069",
    "entityType": "User",
    "nonce": "0x0f2416467b8c4ff3f96d1a667e15b5e2fc3258c6a3a8025e76a77e2b320c326b",
    "signature": "0xba5979fdbba2f2a9227bfffb6afbc695f86492207adf55e1c80f21a6619ab22a2d84225598cac7b2883ee04e4340be8ed5fa66efd9dd523381603776e16c0b461c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}