{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0xd6410c18f851677ecff44e397ef074a7225e45528b53ea8be4f46a804ef7896f",
    "signature": "0x37c6c3fc7c9190fa80f369c31cd590e03bab04b07862d4a2ec7c6b2eeba7b51b0f05f1b249f38e33d4714d0dafaa1e239eeb137028994a9fb39b4a9ad6b798301b",
    "signer": "0x1b7C16c48046d8550cf2935fB67A1F848D82862b",
    "userId": "552898549"
  }
}