{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0502c9087b15e78dd62ae6f01afd225fa4abc3f62932729edf1702ef79b753d",
    "signature": "0x0b9668a7dab25d90d9c0c55401915385ab14cd6be2aa1a9ea2ff1462e52a51ca2a6624d615ac0090133ef5c827d42783fcfeddd3a19247f2c3c15d50b12d6a251c",
    "signer": "0x89234D73dC288b2dE08BecD5C87648bBEfA3bbD6",
    "userId": "218887895"
  }
}