{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x195eca5419f9dec3872c8cf1c4a9104fccb9b88da4b9b53e6db184df51d5a732",
    "signature": "0x769963a21cbbc9d9218c8aff449f6c0a9be2e6bc0cbafb3b5c9158c6f076f1850a966717103d3271ff0a9a888b80aae2e7c37a5dbb734c61d1f95975e1b48b921b",
    "signer": "0x959FD51Ead810737Cacc5f4E62CedE5307F9BF61",
    "userId": "495160577"
  }
}