{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x9d6fa78379b91cebc0db2548ae2bf17c73ab110e872c513189623986f32f1b0d",
    "signature": "0x3f1ef610cc66d27c49f1b477a3046933788de7dfca8b1c5e5dcc4e959d7deb0459dbd4ed62088ec6c24f2cfeeed94086520330a3f2fe116bf4c7f51259333bd71b",
    "signer": "0x031768c05F8AC66fdb9B2516e50f2EBfEc351dfB",
    "userId": "403976571"
  }
}