{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0x7f7f5bcaade8a6eef65a1d02bb55d9a79976c43f29008826aed3f4ed5a9acc43",
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    "signer": "0x14647618553BB8A26AceAE7C85dB5b376300dA8F",
    "userId": "999002860"
  }
}