{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "502385335",
    "entityType": "User",
    "nonce": "0x50c8ae0e88a8d5a4d6d2d004c298c80832b61b035c9a64d98770eb62fadef16a",
    "signature": "0x5d0e5ca67ad0cbe46b743affc39cc08f32e9d411da818e9590c66497829f711d34bb4c2e242c20d020fa223716497cf1616f913e0c5ba0ec06699c388550e15f1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}