{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "854915999",
    "entityType": "User",
    "nonce": "0xa9884a32c9cded5d04b07c3e8f5381070de8afa652d238aa8e04a0918288a7d9",
    "signature": "0xaa550a612e6ec758233722db46c27bf0edcb17bfa338245613846ca49681f88c6f8f6b31449d2dd050594665372953a7427385c8a0d2aae8f2040703cc1a48111b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}