{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x069dee1f78b91f3a8ae3c0d0b1514b09d4e6baa82f98e0ef521f3d8593471f83",
    "signature": "0xc239e8447ea6738bb87e9c1e28383c60af4ff6d15579c58f80f896ccd8e37d60475adfe2e7bdff9ba095a57e94c8249b5856c99520661ce13b9a82189fc6746a1c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}