{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54708",
    "entityType": "User",
    "nonce": "0x16c1cdedbb8525e11031da2672ceea419b1ff672e3d2078e2727eae1ad269f6d",
    "signature": "0x51f75fb7f4f81bdefe9fb3fa8903e955a598019a446ae527739ef8abbf44aa4e6bfbafbc703133a14b364ea9d7d4837325bcff692faf109565863843b48542ac1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}