{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "396603",
    "entityType": "User",
    "nonce": "0x78f0ed4e561b1c25a22f238fbfcdd3bff23eae0e570469119ffe1e693d844e1d",
    "signature": "0xd256b1d6aef397697476dbdf5f6bbe0cb8a4ab9ebefaf093257bb3a0335db5de4e88013a2ee6ed4126a9b9ec454260e424ebf7b32551e734f5b20ebbbadd48511b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}