{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xffccb87ea85369ef3a8d41c9143c996871977d5d3e3b4c77527dfad574cbe116",
    "signature": "0x21e05caf460457b5e822bbe405bcd22211820a26767c557e49a4a440151b4c5902458a5a586a47baa8e7a1c1ac6b9ab18c818e541f45218e0675fcf5a2f33b461c",
    "signer": "0x840A7C042eD908bd611A9469655521b6978C9120",
    "userId": "439830191"
  }
}