{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x678008995da7d9f12f487a75421b1a901f7d7452748f91d4313e9b440db0af95",
    "signature": "0x9ba6155445f7cae774e369580961cfd2e1b86d69fbdea7af6c606c7c1bf851fa4a08956a2ae16e373c8d375ac15f37b336b58e4e1379c0bd9fb3afab50144d511b",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}