{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "306838",
    "entityType": "User",
    "nonce": "0x9d973c555d70833d0756ee29c15740e6b9ddfe050881ec60325efa19040a7c0c",
    "signature": "0x8bc8edd572e81672a729e8fd4fe4e4bddc2d8621a99bd2035070562af470f83d4f5e7d78f5ccc61e53961d77a2a58031ac224cfca1ad579e40c77155425b9c411b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}