{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0xfe474e44065e81d8103b0367475ef28b4ec514a5889495c2f04c9f509e6ce296",
    "signature": "0xab3d9bf22dcb754e33253bd4e537f6cf884c9660bac7950e9cc3b19f7a1f6b477da70ced830e8e1f07aa4c5f77d94a9c0519f791cbecdb4ee9c21674d68d85c51c",
    "signer": "0x4fADC28D15fC4B42A6ab378E5b6155d0b8F33aaA",
    "userId": "372589391"
  }
}