{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x36fd929cdd537061cedea22c1cf75bdf0450ed83dd1c876a0c6e91bbf9368bb4",
    "signature": "0x08d858bf46a3bede16eecdd7fb6add944b400df4b0cbd25c1aa824eed3285b1157b7b1b350f40b10a502a2176ca9abbe0cddeb925616edae35d1d243e9fb3ea71b",
    "signer": "0xEb5CAAcE54E2A28dE521238663b8485d3347A46A",
    "userId": "203621449"
  }
}