{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe968897be1dc16abd364939c0657fe0d71c1525a120ad6ea045a932cfdc6f999",
    "signature": "0x9d2091db218054fc5f2b863490f9432f77d20a753d69ef5b27d5feb64f53835643238822b68235766f28e08cee0cddd55d0ca4c4dd90de51d7686bd28f70b2061b",
    "signer": "0xfd922fFe7bDCaD44A4Cb39ec62344aeA629Ae0ac",
    "userId": "431555736"
  }
}