{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "450075978",
    "entityType": "User",
    "nonce": "0xaf7b7ee9445b70c48c395bff542f067b96fe0c2c5455a6e7c5f4f06bd59aec2e",
    "signature": "0x6df21ecc4217561db21bd59910d17266e47fc81f6b2068f7cfc0171d99455fed587796200dcc579a0b57a02742f803e4e99c71b636978851a9ef41859c7146e11c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}