{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac39eddc141f8ec0d3639313d4720a0747dc3e393eab5a2271e9bb844e4e4b0b",
    "signature": "0x21f61d13eb113efd9c51d02695162dc4b20d62bd4a6e36079e22c36e8d6259806f0a74ad066c7611fe8ad315f6d4457f2061775ddbda309f42a4be7720ebe47c1c",
    "signer": "0x6F6826e2AAe720815B63697437D8A39B47d76D66",
    "userId": "879761069"
  }
}