{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "719754",
    "entityType": "User",
    "nonce": "0x0536f2f4e20963defa0c3e48a1254baba15fcecf8e1ac4b9d7f1c7c38728c3ca",
    "signature": "0x990f8d509823e50d44490cf49d8ed22148801990b11c9416f42eb47e0b2a60965b1586904cb9b44c49f7ef990e4fe334679037481d0af82d9a1f588e59e883b11c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}