{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16639",
    "entityType": "User",
    "nonce": "0xc3f64bc78dea3720843256a29ffcc5d7145cb1b6bb8272e23a29e71c942ce504",
    "signature": "0x973c444d16a6a615fb94f4524fa101fc46a34895fb9d4ece91327a4d847780855bd43ee922744609a8928f1f4b31548e8635aa2d1ef85144b853aa88a073348a1b",
    "signer": "0xE4c0c73a0c0CD7f65f1bE942f8127c8753aB89D9",
    "userId": "857284925"
  }
}