{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339904",
    "entityType": "User",
    "nonce": "0xe814f4ea6accf41f8d368eafb9f4d5f6d0b29baa7edfc86db2a131b29ad9e9ad",
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    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}