{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x149219c217462f5da9758eca98d74de0039e83eddb87f22a58f97b266d686693",
    "signature": "0x88248094fe6d342ddbebf312f1943024036bc37079ce4d33caa9dceb6eb2a2e1343a566597ae9f1d8dd37b3f9fd3d56534e9298b4cc045dee12b147a42d6e6281b",
    "signer": "0x700475a42e52A49240755e707dED9c9e329761D5",
    "userId": "250196125"
  }
}