{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0xb92e07aafa31b4fe718742e09efa51674b2b15589cd4e6b2f380cfef21a92450",
    "signature": "0x4c5bcb7fd86be9f768cf0bbe9c50b4ed5c967ed11f5a0991c8c04c7b26beb00518815f5a02f1ac5ac5f069f9d557d0f0f3b0455a0e81c43743e6f76d5a8d27461b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}