{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd1e80f5c48cb0f372ce191786368416410297e3f1cf4b57c40cff03cf2b4a854",
    "signature": "0x5fa5d48e81b3379afcd41a548dcc4656165aa08d3e3e9b7377b6e3349c28b5ca1782e71ddca4f920e934be72ab763ea7eda06224ab8a68d83e298120b6bf19481c",
    "signer": "0x75D3CaA74fb1B4204DfEBc70D8A49758Df8325DC",
    "userId": "460903813"
  }
}