{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "600125181",
    "entityType": "User",
    "nonce": "0x289201f71915a34f83cd1972a2f96bc8aa898f57f6e2c4dd63cf2185e48a65c3",
    "signature": "0xea91eca12a5dc2da8f4600540e5339b8f1b9162a2af90bb7360388d0a830b5ea4b833aab68d2bb5a48e06b68cbce325113ae355ca3d6cec7834b5c08364cda191b",
    "signer": "0x14fa63A530B7d9254d20B110AAc25ABF49fbfa9d",
    "userId": "182428"
  }
}