{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "870591918",
    "entityType": "User",
    "nonce": "0xa16ecb6aa9a30ca60b7f89cd067272f9ff5fd01a45c0c6fb4b6fc24d5a4731f7",
    "signature": "0x07b16a11c8f82df9f6a13064a3cfde68906424e9135b9c3d00c040a190234bec45db3455ea83f6c536cebaa9a603966aeba0f39a240fcd3233b3c78a8579dd6a1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}