{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512358827",
    "entityType": "User",
    "nonce": "0x205c8791d8e45ed82088666c060206647841dc536f72e65ae958112b3ca54750",
    "signature": "0x52640456b7ca9cf58f0e864a79f2a8225e882526f291b75bb06d8716b90f096e4861923f66457590fec09d4d2d649236c62ac81b1c78b8f68e0c1fc15ef3df8d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}