{
  "manageEntity": {
    "action": "Create",
    "entityType": "Grant",
    "metadata": "{\"grantee_address\":\"0x1ba4906aea0d0f5571bdd6e4985c59ad97ab51b2\"}",
    "nonce": "0x2c0ff63cf562420aa442695527900da0eb173f6b7cc104212bb406079e215b1e",
    "signature": "0xf52740c21ed01da19cef36a574ca3824db1288310a6d176a8b8a1365929277171898420832db03c791b1a4b3336976c167b373405b53d1404d0b40b1f7f5acf01b",
    "signer": "0xF800E0928f8e3D2620668c8e9CCA3ed56d3bca5B",
    "userId": "892227654"
  }
}