{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "578849678",
    "entityType": "User",
    "nonce": "0x849aa02664a978694bbace1f2b003030f8eecb834a541d019dfe8fe05d3dbbcd",
    "signature": "0x1f742e7acf5a38490c06a6bc7b7bd70557a55ce599556ece1f8be5713f3fe3270f677904807b26877dc92af44365b78ef37ab8be735b7365472db4698b00e1da1c",
    "signer": "0x3e30a6d82F7A5625D77D04B0FB2f510531DA2517",
    "userId": "920136801"
  }
}