{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301669",
    "entityType": "User",
    "nonce": "0x519e9c78c65b7ce5d9120a8b4e1a4419dbf9118d4f7de9e442c299c20abfb77f",
    "signature": "0x0204f4638ccea05d19f6c99f27b35028ae7745c0a5e1758887a0dd08d8a7124a06572ef193c057c5fe0ad802cb484c6a22a635c6870f30e2e02663b509998ffe1b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}