{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304817323",
    "entityType": "User",
    "nonce": "0x5c83da6cac72015c10d2b3f0aa20ab2ceee8ea27058caf4e2a7ad14ff39dbb01",
    "signature": "0x9d9ab3831adef9ec0770defb52e0478e453cb43706d64e81482ff87b371b42856f59270f4cca76feeb82f996ec0bcd17a6cd1af17756958044cf0c1ab837ca5d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}