{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "600772925",
    "entityType": "User",
    "nonce": "0x3805fde226787d678186b7cc539bf689e5390d278a7898c4f2d2629f17c02033",
    "signature": "0x05141b6fddc5c9704335c6ad6aaec33e80a6f4d907e879aa3f90afdd889adf62482b7976c5147f9f551cc47894adcd7adc5292504b6aefd1805c1212353caab21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}