{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7c9c91c51472c2efaf898e126267ab3394f958bf09b4fb084e9dd64257e8c450",
    "signature": "0xe3d243ce25a0c2b7ed95aa7718dac12892b15d21860368584b9e570aaebb96c40be2e9261efccca6966e77fef0d17028b9960a4e438a449a28613bb6306017b41c",
    "signer": "0x4B140b61EB41438Cda0Dd10473ad1334309C1b97",
    "userId": "45511108"
  }
}