{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512820",
    "entityType": "User",
    "nonce": "0x229cc42a65e3278072e9750a4baf4d260f57e4b16b31b2553940f250d35c1e8d",
    "signature": "0xbd4b28af4c64d79c88f2559bc4865411ef97bb773d25a5028ad8d117a25db8cb5bb866def94ef6f36121b577848f9b5971c46e558a86350cc84f8c57e950ad451c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}