{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "521031886",
    "entityType": "User",
    "nonce": "0x8977602ebf9a94a143aec88f0075c179e5e3b9de63fe28b6a5e202faa69a8883",
    "signature": "0x72c8b307363a39862907cbc041478d597cab8215316776bc3fa96f08f542d5ee29a585385fce4a48b472d1487caf7a3388ce258b82f7278e5b7b2d73c1939b9e1c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}