{
  "manageEntity": {
    "action": "Save",
    "entityId": "756150589",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0fc90849be014f98e41be42b26626940e5a6691cb30b1db5f3adf3816ba88bb2",
    "signature": "0x15c8a102664bba58c7cd5407c843058709deec65bcaaf9f91d61309cc94c790a06886960f22d95cc26663b34c04deec808defdd67b64d6405fec138cc750014d1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}