{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xbeb4e755123fc0ff288996a149ba73aff174e92fc68fb5ccf6d7a4f28f601d70",
    "signature": "0x3bd0ff0997c944e7bf92601007a25fb60f53a5886c91ab2b37f52bd14adb6565496cd340aa0b1778acba90b3b015b22568ee27f62d1ccb5bc2ed0df10265f3421b",
    "signer": "0x78CF3E90d6e66C1b735fCFd75dE4e88c3F67415c",
    "userId": "587496127"
  }
}