{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x6d674221e4690024a3b7c5f28f5736ff3fd9c8bc36fd0d29b5175fa1300c9086",
    "signature": "0x8c9e505977bbfc7e222795201e373e7cd4d6b219a33bf6020d37053e0861f12d22428209e6e7048378981314ea4b13cf512f0bdd3e2f7165c573c5369bb1066a1c",
    "signer": "0x83A4162810A55B49858D3b17aC8572D1c34eC8EE",
    "userId": "517422960"
  }
}