{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "731581",
    "entityType": "User",
    "nonce": "0xbf960775853798d355c4cec0c435cc41057c8e6d99ceef77d1340783587e4a52",
    "signature": "0xc9081bfc8d9646281c9c5e4dedc2bf448770d0a577444d7536734d9915c322d853267b041dcc87c17f35b12998d58c50096c9ffc6d61ab7c64229c9db4c13abd1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}