{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1604",
    "entityType": "User",
    "nonce": "0xea282e0ebd58369382f90a02fd56d30a19c4ad00b5d853351b236c01b775efac",
    "signature": "0x1ef8c94666be4816cc37afcb4aba29f962881fce9e62e6160a1641359898f63f59dcb2769136f2f8f8006b3403d1a354ba2c5891bd3d65fd201e4b96cd9a09131b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}