{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "921749721",
    "entityType": "User",
    "nonce": "0x53483da80c403ac59d7ba16fbe55aab9ebe5c1ce45074e096bf2673e8641100e",
    "signature": "0x260a13c7eb35c09d499a1e84c4a207576638603d8113da31fdf199b5a9dd07963ec1d4abdc472d65fdcee7c2e70946e1fcbb2d7108791e09e6ab77ed47415e211b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}