{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd1408d16964f4e403fa88a2c0a11cf6df012d67fcb6cc9fa998367b0e10f12f5",
    "signature": "0xf0e6a57c358e5516a052d1fdb82f40e01843855b2a2f09df058eafc78c9fd1ab42871ccc787e30867b73bbe4a39952e86dbd09d4cc22d917569e43d67351c3bc1c",
    "signer": "0xa0306042Ffad1d4cBEd7ad969C64Ee57a49d425f",
    "userId": "718100986"
  }
}