{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620706591",
    "entityType": "User",
    "nonce": "0x83c9f4d99f2f0b864f9acf7b1f58a0da003b85190191a697b5317de0a75743c5",
    "signature": "0x37627f28964732c68d58996f1662aa4fb2e60e73aa4b20b6cfa203dffdb9e27b58eff4794435224a1cc30e221bd1b1d71c66a9b288296cbc26a9f83f43700cc11c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}