{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0x1fc19057022578ee295750dd896efcbb5b059dcd8ad4d7cb4acb945e10a6e595",
    "signature": "0xfbb05ef2637c7387973941d374b6d4c9aeb48eeae49f527d43e111408da4f87c185308feb0656e93430bb5048ecd377cbde31c7212d5d1068008dad6b74650581c",
    "signer": "0x7173743A42637B8FCa1dB2218B9828Fa14b3995C",
    "userId": "763221081"
  }
}