{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf8f448762c7341ebe570c2adc4b4c62eff9644253441f473891f174b3296f80a",
    "signature": "0x3d8c2d9c3d682ef6575ad9780fd4b9bbd9fe756f3bf1b650ab1bdf6b7177fd1b541e394788a3b0a7b78c755e0f57a0a58934f5a8bbf6e30ef84da3ece47588381c",
    "signer": "0xe1eAe9Fa3Fef187944BA6cBa5C534e1ea257CA4E",
    "userId": "344552512"
  }
}