{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3db4a4bc6c0639df385b1e16d978795e0bb77de1b11b0c71faf355eafb172fbd",
    "signature": "0xfe29a3b1896ef547c8df41b135cb96d8a9e34cb769fe5e4667ed94abf4ef607c61c0a74ad51768316f4fc53ab4263fd9b88e3a59dc764c82c5a1e05aaee6d12c1c",
    "signer": "0xCcceB09F3A94D5d403Afc7f2Eaae8D241f89E83b",
    "userId": "517330077"
  }
}