{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcb439bcf3a3aa5a29dd8b5a7546299a546c6e19ff54b8b83bc6c42b06ba2a182",
    "signature": "0xbe6fa03692af06d1595bafcd87d6e017a6edc81523cceca9f45deee197ae15f16ed0a3557f71d0f672eae8a532ff818f710d105666d57cb345286f77e52215121b",
    "signer": "0x396fE9EC36fe6eCA89343a7611a98F28EdDADc79",
    "userId": "670818325"
  }
}