{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7504",
    "entityType": "User",
    "nonce": "0xec5d8de90b309d81b07e1b9c9c2d18fe866cd423602ab25c0ef15fb8d8583651",
    "signature": "0x421c98b6c60c30b38d066aaaad04d56618f90afe63bb6418daa3857e02f698a761e8641c486a2d9a067df073eb9b710a96f9ccef6234ff29aebbae5a4c88e5371b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}