{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2e4fe1b5dda27c2a88c3ea6a34fe108faceee680a89da830dc388cc19e7af4a9",
    "signature": "0x7ad0228d313b7205dc4e904b90172ee9c61113dba4cbfb5a1e214fd84fc2b871120f650ec12ec80c76b93896db92ce1c988e5ccb5db14114395c29335426f7581c",
    "signer": "0xb1C9177f0B1536006C4D40177a9b2d16c7DaF640",
    "userId": "121466639"
  }
}