{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "763601",
    "entityType": "User",
    "nonce": "0xb210a73fd5134ab6090bd9647c86c230e5c049694d6f0e1ceba0de04f1e384ff",
    "signature": "0xa934cfff2e0b22b275fdb9f15d49cc3d0bb4776eadaa05a4d8e8c045d46d73b07dad69c2ca61a3e23b0dcd6bca693818d428fb5a8be152ded412a4dc869ada661c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}