{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303",
    "entityType": "User",
    "nonce": "0x9ae62ef1e2360ebfc5997d1dd5bf1b29c5ee29a2ec69393c9dfe59220e9530a1",
    "signature": "0x4a1d66ec7ae21cb457246b46799e7c9c0080d83ed389280cec7c0ebf2b5346ef4376544bb741f02121ee34449b3eebde4439ef4eb3dee6936efd5fbeed54dd861b",
    "signer": "0x3b712C16275eCC8Bf894d014D9CEBE5655F55117",
    "userId": "263108493"
  }
}