{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200988",
    "entityType": "User",
    "nonce": "0xf5e21c6cb9f16c079ddafa23cc76fca490e592c8db5fdf86a6009976252236b6",
    "signature": "0xdb7518cb53ef1b3a89d4ee9ed39fda2bc8bc84ee9ab958aa549d713e1ef5a92b1fbbb412c75b842ea3ce1505d3201738a04fc3dcd3f06576b9f316d91c05a7441b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}