{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x253c77a860c6b2899197be1c464a10e55001bd7f11bfb25ed005eaa90f6c9747",
    "signature": "0xc284cee8e7eccc2fdfaf71b850bc7f15b596e8a27fcbec62e5e449815912fb9017b6e2febf1c2bc77eb8a84edcc86fc43f70538a147e923618fe38917235c08b1c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}