{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x21ca78905f238a7d7399dc0208bbdabf496b58c711ab905c36c6c6e8b45bc326",
    "signature": "0x2225f0f378aa4b04b47c6e16f2580f40dac24ec1c907c629548896d3a9458c134350d2536fdf2243d4af0f052ee409255ce6b79ea2332268b7b2454fabe009e61c",
    "signer": "0xEa5259910B59b55889DA5C50e75e6C5b6B79cF5f",
    "userId": "216655876"
  }
}