{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb5abc9e69e517681dd102b53ec002548b1a2c8a749f94e4ac1dd0c1128ad7e68",
    "signature": "0x64968e505f18a04a1247d101cf9e47bb002a6ef71a8f3c7cafe2b29f16a30b506c53b1fc3573fa76c98d089e7498df0731b9ed612ff5de3862a64797064492e41c",
    "signer": "0xf40A470aAdB83b748940811514089060d688ef5f",
    "userId": "337203677"
  }
}