{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "74108",
    "entityType": "User",
    "nonce": "0x3720521f3526eacf68a053975b4aed11be0f50f364ce116a8e1e3213d28b5d02",
    "signature": "0xbe83c7d9429602a8d01f3d68030f13f9345453862660d40e0d018eb4b35709b6554c1907066e32a0360a1219b97b76b031db0757ddae701bd2167a9e080901e41c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}