{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "521031886",
    "entityType": "User",
    "nonce": "0xa6ff5a21be952338ca83e4e9d8115971a77fcf5ec7491fce9c2d4f7941e81fba",
    "signature": "0x4b0adde14372ae7f924a76be1e0f4daa4571e2d0f75c0f7d9b0ffb8a34e1e89942544cb0ab7b8e34ff64302ce39831791003497aed313f49b5aa8b214fed77ca1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}