{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2c532b2404ba80a664717c489b49ae414b64b86955d0551e95607457e7743625",
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    "signer": "0xbb3b8C270080b0DAE42411345FCDc6a00369e247",
    "userId": "690093689"
  }
}