{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd5066ace7934d3e60273ed6da32812f89ac46553a7fa2ba8f329a448f01a6c04",
    "signature": "0x68df6d353b592c7778f7603f18152f889c1d58e0ddba481de812d0f38cd6f1f106319b6f221ad6bf28da8f8aafa07661025306125746d8ba6efa94951785e4dc1c",
    "signer": "0xA499e25CB9E3d271e0a032dcFF48C75EB001476b",
    "userId": "179264467"
  }
}