{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "683609933",
    "entityType": "User",
    "nonce": "0xde0abdda2e3635b018b37b0b42e043acab0071d3729684745f1f57e6edbdf5e6",
    "signature": "0x62a7fc70d8e26808aeffb9d49dd8d6b3ff59f772594ffa6c8f97def7759016f63b09770eb95e418144039552b1b85364371a438a600087dff76b56fd14a5c9b91c",
    "signer": "0xE4c0c73a0c0CD7f65f1bE942f8127c8753aB89D9",
    "userId": "857284925"
  }
}