{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x1cce89a304523729c507c5816f0c3f0ff7a88960aa6681a58e890ea32d2da1d7",
    "signature": "0x2ff73d9330292b5c15fa8f900a9fadf394a6ed9f2fe724c84f869004f16d549572b518178c9c77d3f7acb8dfeac8fccb67d23eb664535df9efae6f75c411f0141b",
    "signer": "0x73760064D08e854716c13081dE151D63b16b2Fb0",
    "userId": "646161559"
  }
}