{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc0186ff6a492e7f233e19504bb856cb687fe445eda09ae1c476cb8cc1dae4ccb",
    "signature": "0xee5b88d33d433fe5b6a4b2f37ff269e2fcfeea268f0d4c3fd827a7586e58908a77804a7fd89a0518d9889faba15d01bd8293935cba64b7d39ba42eef245218ce1c",
    "signer": "0x1a22371e34aa101eA8b483fE3DCb46178e6a1798",
    "userId": "961339845"
  }
}