{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf86901a40b297eb2f0b9f6e5d3246a14d4a585c6021a14ecf8ac4ef20e88bf2c",
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    "signer": "0x7262Ab09D337bd92b5e88E576379a2ABFCd9A29a",
    "userId": "30148538"
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}