{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "821103753",
    "entityType": "User",
    "nonce": "0x0498fa51ee181845dd2f5a2f5e9931a50fed480316ef8f957592122effcab12d",
    "signature": "0x222b9971fd8789de03d8c7e6df1801302f6bcad2932fee67809342a1d894fca60bf4ece6f74a7d0918fd1c9d705aafbdfd792fe1229029f33580fb07d97c0d671c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}