{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd1d9fe3c4fd03de123d4ae589d69907d4e64602984df8f71ede5aa969b753c40",
    "signature": "0x7684b0da871d5ecd4a29f245176a88b6c0b1c6836b07094cd236a303c86fab0a3694485255aaac6b97b5a85735390c87de8556607105d8b95414f6c5d65375841c",
    "signer": "0xEAD5e96Ca7FaA2eE0f0597E45Bc308cF4EC47b0a",
    "userId": "429363143"
  }
}