{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "674606722",
    "entityType": "User",
    "nonce": "0x448588a72403bbe41243379b48752796b9b9fc0efe88b0354b4ed627caadb57f",
    "signature": "0xe444d82f08ae659c91af55ee9f61b8466a422ac7ee1e1b544d4a16c6e33f25d044e424b10b299008cba32726fabe6823c0ee542643a22b639a7699378feeea901c",
    "signer": "0x9de29362DF595E6949CaA2820c5c28c3D6b0CEe1",
    "userId": "857551474"
  }
}