{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "964257878",
    "entityType": "User",
    "nonce": "0x8ee0eb158867319096afc620d19c94d79dcc58ac9481c96c1b2499553ecd8954",
    "signature": "0x8384a9fe1e9f8929a0c51e191c2ec4931b9d11329aba78856618746b730cb4534e39e5e638afb20d06dbdb99187304ed704fa890eb9277e1bebd18bd7e7b87c41c",
    "signer": "0x1f4676E66f85a00704B84876ae1B19DE3eff1F8F",
    "userId": "965243886"
  }
}