{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x3141b527473a68247a11c0596ed959fadb1738f5218b12f17fc6c968c000da6d",
    "signature": "0xa23b6ed3df3f92ce17d04a61b3c16eb25d5ca731c7a1f9a55440bae44abf8d5d11eb7afa960b5520c88ebed69c55235f4b9d77cc9b89d6d93189f1deb104f6801b",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}