{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd7a5fe228a1874b82975ae99a5f1c921504a5e3a3c9ba2cf67caaf7ee7cec7df",
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    "signer": "0x4cCEFE3ed80eB0E2D6fd6ce73FE230eB3e8AbEe7",
    "userId": "608236919"
  }
}