{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x315da665ce46021850abcf83b605303e3d76e5bec8a097eca8655e05bd647230",
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    "signer": "0xE73f883Db3421168B410336C936E58fECf86cfA6",
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}