{
  "manageEntity": {
    "action": "Create",
    "entityType": "Grant",
    "metadata": "{\"grantee_address\":\"0xcacfe4571ae46feac9c4ede9ab74788aef9a8521\"}",
    "nonce": "0x4884b3ba7256ff3ae633663b846c2aa9d48f756ea9fb70313920e94c8bade8ac",
    "signature": "0x88bb3ce78e58d66e6c08c4270af4b59020c779c95594f16c2a3badebcab2acdb59164404cddde08f0612b43775591512c1c8b95288a3b254dce01da1937a7c701b",
    "signer": "0xbF6Dfb2b0256086E1b66753982D72b8BC5523135",
    "userId": "302668665"
  }
}