{
  "manageEntity": {
    "action": "Create",
    "entityType": "Grant",
    "metadata": "{\"grantee_address\":\"0x1571a6f7b9a9bc53ce8c4fc1ce137aed0be3c483\"}",
    "nonce": "0xad6f0e7992c2def50e9b1f15f08a89aaec1c54aeaf984a97fdfb4504012e4d39",
    "signature": "0x9798eac64ceb75d1796b1ee069a23349ec0dd86ea172fb930b323020edb611ff21a3275ebaa743f022c4aeca4114f6f525a0ecedaff2e3440daaa0d589245ed31b",
    "signer": "0x229a981Eae98657c17Cc2a4827328E1877eA40C0",
    "userId": "281682"
  }
}