{
  "manageEntity": {
    "action": "Create",
    "entityType": "Grant",
    "metadata": "{\"grantee_address\":\"0x8c5ba66083d1ef52d5caa8b250e7b66f4c21e272\"}",
    "nonce": "0x16a98b526127a58f042d3ede3edec540a4553326d2c875a0481f195c0a67bdb2",
    "signature": "0xa200cff6440bbddba8457dad0593b9b229a0c3e938330515926ce03b4e20d21b7469ba18bca7ab6243bde8825ab9a6e4a403d33f5c1b0e5c8965a836f709ae5d1b",
    "signer": "0x2653bB476556347e4a4AbFAC4e38a3F7835d22Cc",
    "userId": "748327774"
  }
}