{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307756",
    "entityType": "User",
    "nonce": "0x1977a57c251ac4f154d23823be13af6e9973ffbd8689d6f3f953afbee837afe7",
    "signature": "0x84d4c50b2df5e60d190c37ba678d1c705abcfb3603f7351dc8ce0dd0ee8fcdfc75645d33ec4a34878f4f6b9462b87702633120baf843891eda7ee27dcd9cc2fd1c",
    "signer": "0x000fDf1C4AbF420F755A036b16C19D32d65fAF09",
    "userId": "612358594"
  }
}