{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "137644",
    "entityType": "User",
    "nonce": "0x0108aac45e0e17c0e3914b0f39d6805664a78090a4b763e6d0a49a2469dd171e",
    "signature": "0x8e054dd93778b854ccf6ece49f4ee900142a62536683d3a69e87f257382e223266c735824caa4b8de50e4d1c129aa1922d17b596a82b0303fbcc0f28d270cc0f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}