{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xddc79afdff7751c626c59352aa66b146fa4caba4a450bd3fecf7e5497ad65406",
    "signature": "0x025b73f3f4a02b6f08e681b9fdce4364db46a6083b8f83c3b274ae95ad5d866f1efa3db9b314dcfacda326a0e3d430ddc9645c6dc3ddc40364b200fc6b07a15d1c",
    "signer": "0x2bd7596D976Bede4Cfb13e34b6e4DB9506C79a62",
    "userId": "505782812"
  }
}