{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "615702798",
    "entityType": "User",
    "nonce": "0xe64c7b9fec642594ea1baa8ecebd4746c2d95b265aa1db2da6845b269a8cef6f",
    "signature": "0xc57db80c778e90620201d8ca5659599d1edecf18563a91860bc3a84a68dd5fdb0020a3344ecbf8756ba10574a30f5c029085e9b56609821c14154631f2d36c281c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}