{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "404",
    "entityType": "User",
    "nonce": "0xf4349ddddc5cef779081c8013d794f82df6db99d15e6ccc345697d4eebe21d67",
    "signature": "0xddd6ba5f20f2aead214c2ba65684d3ef0306845637a6066b373f350e9261b0ce742f270b180f8f8d159878db756a9d63061e98766ea4f5ab1a0e24d6c670b3dd1c",
    "signer": "0xCbeD07e86835F78Aaa98F4139515996B2714e0f1",
    "userId": "973874643"
  }
}