{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321816",
    "entityType": "User",
    "nonce": "0x0c7beb9c83338f4db71cb8a353c9fb95f4c48bb970d27a4541a41733228fb996",
    "signature": "0xfd3d851b1d03b3175ff9dcf9e833c520f26cfab04ed11b897a34ba11d9a3cc9a11cc67ee76774179c1d66f511596fe39622393f5b2221252d7b0d04c6cf9c5041c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}