{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x59b37446d3a53dbb84c599cd23745a37f7fef6e2991759ba64e8cd135d5117bc",
    "signature": "0x00932248cbeb7da3c871260afcbf9c561b3193c46adc97ab1b80598e653a25311b4791ad551e148f1699bfc46fa1f224fb7f98bfb6b92a804e3d9443978027621c",
    "signer": "0x3c84662711809b9f6908C0dD579231Ab57151aB5",
    "userId": "560357460"
  }
}