{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xfdb7fca8999ab86c57dbf3341fb65cebcb1ef393b14bae8ce0c38d0d76ba80d1",
    "signature": "0xb8012443883083f8338adbeb7be38da9b47ab87eb4a11c63fe317c1d048309b91a093bfb78036019d5f2383f2dd196ccb7f85b5d522cb7c87751aaa53740b8431c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}