{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcf82e74f7942a6ec8d336df996f924d0990b0e7012b1512949d1b289f7e89537",
    "signature": "0x7285bdbf9acf82836b5a6725f1b0006b401ffbb84fa4262781977f34ffe65f994b7df7d2acf88ad5bb363cb6b8a4b8be4f8fe9e82f872d2cc8cebb2d0c6ffc6c1c",
    "signer": "0x7d40ca2Be7a233Ea40af778abC2e4f8Afb03ec70",
    "userId": "895912297"
  }
}