{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "294773",
    "entityType": "User",
    "nonce": "0xe7fcefc2a0b6408087a84e9b3c3b7756875f79f21f7323a11f8eaaab89744200",
    "signature": "0x7b1a0e3c7db8c882348a6bb55be73b30352f65542eccaa2efcf5e2b7a0eaa7aa17d408eefb414a2f0533d6f08eb3f9db54fbbb100df93d8dc1113f537b7bb2ff1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}