{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x81c83803cb512e127882aacd5d626d1cbb8aa62bd11471d30e2d72d817bab53c",
    "signature": "0x4aedafbdf6eba0c9332a8dfc13c97ec4ae5caf691d34b27b524c33aefa5614511e88fa9ca62b0551445aee2f46b0dafded22916babc20efdc196967d856e32301c",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}