{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa659b5dca3621f3cedfd7dd0750f2e6070cbd6412e1ed6c663f98f5babad887d",
    "signature": "0x23cca2f151bddd23e6005a822d00e9d8c0934440b063f931b96775369a8a63da4b52656c51bcc4cec6a2621e564eb847ee2d7cfe621e3e2e24e8507e01bce1d81b",
    "signer": "0xA25aAd0206917611edC6Fbdd1632e805d998f1FF",
    "userId": "886744869"
  }
}