{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x37d9700e1aa330566f52a6ec64ae0acf1cadaf90181cf456370570ac8550bdef",
    "signature": "0xc52d6262d9f58a2828b4594abde355009a69fea69909cf72a815de8cc0bf3f0e56af6a2649cc4582ed6e9b14b684f37f5b04ed7788afba7a41906af0857fb2631c",
    "signer": "0xf3eC8D1463A23CdDd8e3137d4e971DAD05FB11ea",
    "userId": "451435291"
  }
}