{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16684",
    "entityType": "User",
    "nonce": "0xbf331046eda346df1bb33d4e9bc6d87aac5288207112e7dfdda994595ef929c9",
    "signature": "0xb7575473f1a8fecd508f69efec72e9a3e152413fa14ca143b7bbc18676dd495f7ee39a42d02c9dd8a9a8ec0c5a808b7dc30fe8e987bc51a7cc5b1864d9cabd591c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}