{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x83d2af66cddfa6b316ddd1749dcda1fb55b6b0fb6973be896c3088c9a79952a7",
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    "signer": "0x73760064D08e854716c13081dE151D63b16b2Fb0",
    "userId": "646161559"
  }
}