{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6f5c519f4f85736bf23951ba8f72c1f04a5201d9cf561e0124f306bc09ebc0a4",
    "signature": "0x882d9e8026a65403d52845d85e10756f19740ec12e51640fe471003b083742e9156becfcede25cd338af6876622e79ecd4c123fb8a4cddf548e36209685e75ee1c",
    "signer": "0x3e0D6A2408F5c21Eab6D31A5F260b7842CA703FA",
    "userId": "930696642"
  }
}