{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "381638009",
    "entityType": "User",
    "nonce": "0x305ddbcdb6f761403a0c752e845d40790775731868ce218dddcb64a89bd4ed3a",
    "signature": "0xa17bf43da1cdc522dd5620a6052536ab095aed146d807e0c9d58a2e076ce6a596bb6a5c1f28b39d22c0634836b52bb930d1e0d390f5361d171b6fbfb21c1d7141c",
    "signer": "0x6594d56eEB9f11123c23b7F1D04C502A2A62ff7F",
    "userId": "16314"
  }
}