{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x0c1167ac01a95663f6e9e0568a351363ff8559b95cf35b03677d1f396450562c",
    "signature": "0xddd58b5b9aca3b8d2d1af8579741b8768dcefa5a5809db2570a5aa4e156f320549aef7d93399a7b869925a8837efdf691a7577dba437bcdc3555aedc6ea0b7af1c",
    "signer": "0xCf3E6F9F4BF41C4e355E01484A92aaf61B6dd8a3",
    "userId": "149919577"
  }
}