{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "451684863",
    "entityType": "User",
    "nonce": "0xd7411eb71b0e26541f8d3830527442c8626952d750351850c03cd16426dce8c5",
    "signature": "0xf2070d764f74ce1103a011a4d86d52787c74a82b9c1af5358d2763db509d48b978dbe8ba16e0a8a90f6d7d8b50f425a9362d0b5cdd65e8c6b6cbeba821a907b41b",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}