{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb55d2ddd12dffc9ea927b13296529ae9e414acb668ec2d1c5f3d79c4948a5152",
    "signature": "0x57218d42230dde394262124c96ad2fce19fcbed242abbcbe71417f10712c8e56699624594ee965b94ee39fc3deb9f35180f98985044a3f41426f3304dce0e7b11b",
    "signer": "0x86BFfB6d678187fc90264C94CEc5d39Ed9cfE077",
    "userId": "788370768"
  }
}