{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x799adbd1e5b135126d71a7860263ab73fdf7cfff7e3892b5288d377557a67220",
    "signature": "0x2a7dfa5f4a048efee188ca6d696cbbb0f9e9d8e60a5c7334ec2b8a757af761bb6c681f944f317e4b7536c39a1416dad7fabeb61e812572080ff42574c51b68191b",
    "signer": "0x0e6Bb8099862687B97505ab00Cdef58401807909",
    "userId": "712968540"
  }
}