{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3520",
    "entityType": "User",
    "nonce": "0xa9448b61d586ba3a6cb88895deb737fc066a228a82101faed772b0d0a2f903e5",
    "signature": "0x26c2382ee8f128a9b245236a6ecee0985439f4af3cda9d3a11bbd220453e4c8f1e8371afdf80c4bb488a591926d51aea8339c0c84ef6084f4621ce186b54b7c11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}