{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x812104c6a66a51fd261c7ba46fedb1928989db52aa5612a8a213942d89eee35f",
    "signature": "0x50974a9c0050a29c29c9670c39474d6f04c2a7fce4a9bbee966bb0fe449a9c4647fef8bc7f4b8a7e3766a065cca8937eeb18c4363b2554c088af0955fe640f921b",
    "signer": "0x61759FD9d69b6C29FE84fc39eaB6C50Cf7dCd8FC",
    "userId": "366953361"
  }
}