{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "667809204",
    "entityType": "User",
    "nonce": "0x0f21ff1a2bb1d13e3fe1ac62842744192d0d6695902ed4c15f1305368511b5c8",
    "signature": "0x418c58d22c8ad13a0b15cae5a04a480377996cd642cdbf62fe78dca078b21016678b53625fdad536135c1ac015ad80275b8a0ab0d999f4459afca2e979ebfebd1c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}