{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0xdcbb39059c2445472b8e71ccf3385c90a263d8143cfdef004a51bb8a929b141b",
    "signature": "0xf7c06689b5f4f1cd7be019227dcc57278c2ad0fc886a938cdd703b7694eebfee1cfd99882e994f477c5f107b1083edb11b08282a0118dea7642e1037e52ed03e1c",
    "signer": "0x4391C746E11181B87164C3C6DcB2EA773D749ECD",
    "userId": "729432364"
  }
}