{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0513820162f70239848767f6defd0c656526d4405209c2f8b4db1f54f613eb87",
    "signature": "0xa254300ebd3336e21220a321f6082e5643e34d6e74ef35aef5edff8582263e3e6eb5f6a12e1f2496d1d667e057a5411b74fa5fd26772480862ebaa54817d20141c",
    "signer": "0xeFccDce3d111c4a3785e0750f8fd608677870acC",
    "userId": "883838503"
  }
}