{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1948867",
    "entityType": "User",
    "nonce": "0x15ce87c688cdc68934fd61548d75860647d5401434cbbb119cf0b1eac9b36f35",
    "signature": "0x7f0db8db958c9bd29ef29f8066d6c7eae94230fdc1937a7388034d450fc48e1a09a0029731337db5a4fb04f85d6e77433f9eac4ba465185c7858a7c9ef40e65e1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}