{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339826419",
    "entityType": "User",
    "nonce": "0xa891667785b0c6586706d0245a412dcd742a9101cd931bab4f763b621fb85c77",
    "signature": "0x56f1d9dbab1e485cccd96748c8b8ee735a797ceb0a7492c1ade39c01353ccada378f7d37501ad3c300ec882293b4faf357f33c7279bd6e158029bfa782995e871b",
    "signer": "0x378543D1f467aD15E6688fa37eFF55939dFEDFc2",
    "userId": "200959284"
  }
}