{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190351",
    "entityType": "User",
    "nonce": "0x83b12c591a0e383039e1023e62364070096fc54c34b9c1a61d150b1bef2b14f6",
    "signature": "0x5f12b65934e229f7a04a52de6f7d18191e0af4b22dffe615e986409c4282275e0e82b87e7e67f017131515952a43633673bb37b62ad85024ef8bed2c5932aed91c",
    "signer": "0xa57b4357994d735DB3Db20349Ac21e880472e94D",
    "userId": "521443517"
  }
}