{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa9576fa57c938e1a538b64c4a2d4106a2f98fb5d9a816ae4a917f583f2b108c9",
    "signature": "0xc3912d846a1bb826b70408273129513e9ac65969b0b196184b1c30ec179ce7ea41d7f9220966739899b64d5c22fc696819d4a573307c9ab95a5845a7d92826951b",
    "signer": "0x4dD8f87Fb57e57661Fc7F115acb4a0235f415ABA",
    "userId": "806547662"
  }
}