{
  "manageEntity": {
    "action": "Create",
    "entityType": "Grant",
    "metadata": "{\"grantee_address\":\"0x6c1ef2e9c33e2ba1c0d352e41e06e8a3c7721c6f\"}",
    "nonce": "0xeca221a661b76d668d48bc37ab59b13a5a1660b8ab48b99c3c6250a0c3a3805e",
    "signature": "0x29b5ffca791aff42fc2ecbdac847b47c9d96061f183a7807ac3ae7e53a886e1136862ddf24e8d2f946da61c37490156ce08f3b679561a38a100bd2e6bb78e2cd1b",
    "signer": "0xCEC54eA3C9c325A128598dB6dccdc2a80464D778",
    "userId": "539638865"
  }
}