{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "338557",
    "entityType": "User",
    "nonce": "0x3715a45f9d065da4af8e386548d75d231f45531eee3b741a147b87865c3c901f",
    "signature": "0x5abc6f7ed6a6555de2a903d1351882fa148046e6661119e8a5127278aace12062ac268f172b00666f3048c4046a19694821601fcf9db89103eaf6fa6bcf9b6b01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}