{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "189900",
    "entityType": "User",
    "nonce": "0x70051317a1cd8f28fbb2a8da899bcc1f266ffdff451d19fd667bd66a76a4740e",
    "signature": "0xf3145132fa58d85f3ebd156e2993bae33311f31464d6649d4acb4b206e7807e213bb954bf5c5c712f7ad95105654177dbf44163f12d1b0d3668fef4eea61dd861c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}