{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "721174",
    "entityType": "User",
    "nonce": "0xef98bf548f817cf4765009aa0f9fe2dafa08bfab9f5ddb73e0a987d91406c9db",
    "signature": "0xb791dbd6407fc8b00429ec5c6748516d955706f97d09199554b02ef8054896196731a005280bbe8c15de81f2858d812afb2a583dbc9d369e2ba2d5875c7afa0a1c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}