{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "358999",
    "entityType": "User",
    "nonce": "0xc9b1d2ff5db39fb9861d6b2d289fa4e9e0bb000ed5e8ff56fb685a160c480e20",
    "signature": "0xfa12d2ec20db31ed187ea70635aa0c5cdbbe64bc489775d4e4fca0e52454e5662471f08fb3d0478035060caf21dc68f0f48485211f5331114bb1250be39c15001c",
    "signer": "0x21C9b5409a415E4F0923C5378a82C85B8dd3467f",
    "userId": "575912766"
  }
}