{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x64c7621b87ca90470712f68381a1cfb7e968557734be92892110abc935282d69",
    "signature": "0xde0b3b805c33b4011f60822e3eb0c9a07ff1f1c897e8674373117bae52a1da7128342251dc2072f033581f21c324cb7cdf53b3f7e543873b7f9b6c69e8f1b0081b",
    "signer": "0xCCe749020E45FB96926be24f94FFA5f35e955e66",
    "userId": "810833505"
  }
}