{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0xd1e0842ad6dab6c6ccaf72854cc2d40e0ea96a1843a14b29b9d1f1008d66f714",
    "signature": "0xf3a94da401efa3ac1bb7e8dc00904e1b8d13f05289da528ea56e1402ed2cf633736f7ad929ebfb237b5f36cb762be1581f7d9b13e806af5c5ce2b50118a2ec801c",
    "signer": "0xe23f94433EED8958AAF9868141BA976B8fffb969",
    "userId": "307915745"
  }
}