{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "77713",
    "entityType": "User",
    "nonce": "0x1545cd712ecbb1676cd19abaa5844b21f2c28cb2edd7996eb456fae5148b8575",
    "signature": "0x3e5fbc2a057ce3fb34a42aa4046ff7cfe0ac75fbcab599f92b50f83a4666b35d44b75f1d6cd493c933358a6dcb9d453fc741ea36c950abbc650c3f81572c99f51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}