{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75499",
    "entityType": "User",
    "nonce": "0x646cc1d8a3dfefd42436b7ffbf64685c43182d9deaa876e79818ce8bf971a85c",
    "signature": "0x65c7b1d82deed6a089e9fc339ee5b7cfbf5ef78121931984aa280c3f36768a30753e7ee7a9c7dc2181da50d20b9cd9d43c1d2bf6060b99ae8f1f1c9e91aece961c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}