{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301753",
    "entityType": "User",
    "nonce": "0xd403eea354d3b638d8814a59aa4ffe703e2cb09cb36f797e6871d6853c002ec9",
    "signature": "0x2994dcbe42bd894894239c0a48aa2afffc39547de29cf5910b843838f5ad0f3c0aee4d53d23402229965fa1a58b307e706612779cb54ba4ca7a301e26237a6371b",
    "signer": "0x4ad870a0C318214b4796d1464BC8Dc57C6b84C12",
    "userId": "408505072"
  }
}