{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xeb21fdd1f3a0a3f580bb79920acff2cfece97832b0c25722b3d9817286193319",
    "signature": "0xc9cc3a709777c5c0bff1d04a6d04654d005fdf18d30383a43defacab1cb5f5920f9e5f8e6d4e3ca38ec186ed9801b02bcff8e4e01909ad21b2385e850b58adda1b",
    "signer": "0xFfa6d5ED35Da5afB2C524d973471aD3e0d5d08e2",
    "userId": "670687777"
  }
}