{
  "manageEntity": {
    "action": "Approve",
    "entityType": "Grant",
    "metadata": "{\"grantor_user_id\":657635486}",
    "nonce": "0x25fad149527a2c2165e9430be69d68681d320d81a762822ce81a78b2033e573e",
    "signature": "0x42398fe72ec0cdf8cf0709c5cfea951a61a385f6698a2213d75b7cf7dc63449e6acd08745c7a35f11a889f7de43b9e77ee30e3bbc6b9407611c7f24a57fd2a3b1c",
    "signer": "0x12cc71bF02E05d24430Ac01F30544a50C5BDb063",
    "userId": "55609"
  }
}