{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4450ee32e65c8cbb16460032534f7143b4a84e9288a2f420147fe7958d72050f",
    "signature": "0xe0ee9d2dc1772263bf5aa5f5c240bef79dfce562908a0ed1813c3a637f475be802d90e4b3a5e77f9d14179fbfeb586ddf26c9e13229b80f8462e2270d21472111b",
    "signer": "0x5c0018A404Bc0c2e21DB5D0BeF817dd28ca043c4",
    "userId": "137483858"
  }
}