{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "599751364",
    "entityType": "User",
    "nonce": "0xa61fafa9367cde9d610ee6e9f143be7bb3cfdb5d2303caf606cb1948d73a759b",
    "signature": "0x1f83a5cdd07daccc6851db0ee71364bb632ccc27318e3a4ed3f8d05739319b557cd41abbb82e8d00ab35fbae37c5844008ae049a4ba4a79ebaf988f8dc36d0431b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}