{
  "manageEntity": {
    "action": "Create",
    "entityType": "Grant",
    "metadata": "{\"grantee_address\":\"0xaf88b10f95e305015f3f68fc3b8202287c24878a\"}",
    "nonce": "0xc2b01a294d7eac0cd5417d421e2d2e273366d6c9be00550d2fb5600a91c2b451",
    "signature": "0xeb4d64ba534792a22d594f5ea8154eace7cad87b25d8506d56fe7a55eda4361a23eaffcd71886e5900374ddeff76e27d77641841cb15217d3fdf60dfd378e3bb1b",
    "signer": "0x8160D06D687617BAb8863cc211b8658B7358f4BD",
    "userId": "306055028"
  }
}