{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x854e5acea01b201c07350ad572d358d0e0d9842bf3cac152c7ced6092d7c361e",
    "signature": "0x3cf3efabd00811772151ac9a1949cdf9ac5d89db2a6ac8f277ac726e6c26b6c430587fb4309bf64022b5e6030429dee6ce86335709a3d5ddc518466cc4705bae1b",
    "signer": "0x7F085756012AB9d28d5Bc33213B5e221bec80739",
    "userId": "377266840"
  }
}