{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "373173",
    "entityType": "User",
    "nonce": "0xe0bf21639f7b14d2a83d62f250d243cc05cdfd44d67ccce07a038f9154b894ac",
    "signature": "0x81c49ce3ec90a4f1d738a0a48d33d9d0d3aa77c21f79262e62b5bca6d26b386a5be42c5f3d602bc518218741fd4bbdb852874c11dc70ac3ce12f06dd8bae19291b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}