{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3ee4f027d58223c9144bcf1954cfb194c9be545fbc66a70b7c32add400acefec",
    "signature": "0x4ad63ba8304653b3981b426408f50f2ea2e7bc7aeca6fed370c3e404c73f3911438610e93d78523238aef7854b646884a003db34209a183fa31daa187492b2381b",
    "signer": "0x2D95ae7B07b469FC2B440245F94936100bac734F",
    "userId": "814776560"
  }
}