{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "273403361",
    "entityType": "User",
    "nonce": "0x63bf91b528e0637b257666fedf19f2060665e19cad52b5d6f2b29fe9b646101d",
    "signature": "0x31722302137d40d44a057fbe2cf1d5d55f6344ee917fc066467a344bb23fd39f49fb0331394ff004c4736636c2ac72ac9997d026732509a6968f28469a3281111c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}