{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "5642",
    "entityType": "User",
    "nonce": "0x3577ce540fcfe4d7657fdb533ea273524872659e4501e09a2f0b5f30d3f68490",
    "signature": "0x38780a1f05c3134c96e1ae1f38a4104b50b1581c67c46edc6417946c40de3f113830ff8c3a270694e2ae33a99a71010b412a41da7dd571becd5453ee76c01f1c1c",
    "signer": "0x99b5F46ae3978FB02A645f824e51700B327f1d6e",
    "userId": "97654"
  }
}