{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "398988749",
    "entityType": "User",
    "nonce": "0xd185a984b2132f2a786df145a8cfeed6444292720efc20e6734d996816741d08",
    "signature": "0x8e4380d2192f884dec5d6abc91450673d31d310e2dbf2c9dd58757c6c7861a354812178246a6de3a08c87b1f2b830a7e8f7a5d819e30ba1ccb4abf631b113c5b1c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}