{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x14dd20f428c5499cb311743351a581662dee1f9a540908347899fe53f0f19d7b",
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    "signer": "0x4ABf9A66a3AFeBa2CCD607dC639F2C9b05B67eF7",
    "userId": "590628208"
  }
}