{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "325624",
    "entityType": "User",
    "nonce": "0x670de9ad0f682a6022025ac5d3bae8a9d4e4ca53eb06db050b4ac99408035213",
    "signature": "0x64fddd2caafe08013054e5b37ce05ce3bd219c31649b06c60e710cdde2cb2ba9710a009b84313d9f66b41fb2905d8530e6700409ed57ff066ef8c98a8fbe70701b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}