{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xee26ba2ef856979a2ba118be870f4cc3c5b61e4bdc42b260c4fc96805c68a268",
    "signature": "0xfdf7c1115ef6067e0e75181d1b78a80b9f77eb7db3c7e024130aea496f7be1ee23f93d43b02819121af83a186181c45dfc342e0bfc9c7f1b4a9dd96ace77c6831c",
    "signer": "0x7e7c4e740Cea733165163E222982F54E723Acb3B",
    "userId": "156619761"
  }
}