{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6421d8f669db49d05b39cb0e07a9abf9dfb05149be5512149ca7c6c2a14c9b12",
    "signature": "0x02cda5c6035d32f64ecc46934c637a53647e183eeebf32ef65fc45410f3c8ec4702793433a04f156f9cea821806c20179532c5b40abccd718b528ec1b81173821c",
    "signer": "0x9bf7D75Ef0bA472347F3A449C977c3134461CD8a",
    "userId": "215326593"
  }
}