{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2811ff6a80acdaadaa2d217eb6926ac3f6425301de7544762f3b41519ad26f8e",
    "signature": "0x1aaefb635c588dd15992f6f81eb2e6e9e9ee9ed68a713ab162c2f5c8496c579070a6981ce8d1eb473d043d8a284fac31d97b68bb34c058251e12d985d5ab1b241b",
    "signer": "0x3A5d9303814AC95Becf9EB5a6c572608f82b3804",
    "userId": "12639568"
  }
}