{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "780600",
    "entityType": "User",
    "nonce": "0xf917f73d640422675a1aed9fd767643910fba3acce2f73b5b18d2effc3e8cdaa",
    "signature": "0x96a281f2df99ae70417576179e73d02e02e8c167cc0a748c618a0615c36e09ff09270aae634d9cb972bb36e1c789f06a4337ff573dfe85c76925fa3d7cb3c9a91c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}