{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf5e3c88a5f344e898bcbe3d5487e376148d2689431ec967910d9576fcb4087e4",
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    "signer": "0x1CE15807f84f3aA4EFd014D6A7B160fF62D1Ca8e",
    "userId": "212283807"
  }
}