{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "373603",
    "entityType": "User",
    "nonce": "0x693e6ef439e37dfaacacbb209e804a5a80a0f8ad41c0ac454e8ae1c48389c79e",
    "signature": "0x2edc72f1bdad47a7e5cc391d54a265a9618e8599fe0cedc0ee1198d4b94ded4b6ecf507dc0a23194d3de67eaf71aea22ae1b3b56d51f4cce5b2da6c5a5fe66191c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}