{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0a9e0baf7d41b64c114db94e8aa792c9a0cb63e148a21015f28b6ad640a796c4",
    "signature": "0x64490dae96d68a34785cf44c97ca4d04012a2eacc78f684e0b2e61360c3965947496f017d81a792b2294e461bcdbce71401195262d7ddb9d7f7749f8f4cda9651b",
    "signer": "0xe9c0886CCB64606bbE1a2f9360cF2DD44C9fA43E",
    "userId": "321427963"
  }
}