{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3fcd2204186fa5d264b115313332ff616ed1a983d68670837d715740d2ab3017",
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    "signer": "0xA301d747958dCbd6bedDFA4997DA85DA27707533",
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}