{
  "manageEntity": {
    "action": "Create",
    "entityType": "Grant",
    "metadata": "{\"grantee_address\":\"0x286e7ad8f9447d0112953bdb1684a4b4192ecb76\"}",
    "nonce": "0x83307e73a7e627cefa3a6c97752f8c7da5a07b9586f994588c65ea7a1998bea7",
    "signature": "0x573dd3dce28791dec8d3149eae2a63a8ae048503ce8990be6690d9351bacee6c38ec16d3843489d6448cf591c52c90631af25aee6963650ed8e531370566b92b1b",
    "signer": "0x187764aF631375962CC2a302C55725485770fa0a",
    "userId": "855580477"
  }
}