{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x95870baa167f3dd6c5e47317a6fe06764092a2949585ae2da3300826c2e5db75",
    "signature": "0xbc6851c49ea1d8da090542e97b1d4cb139f846a3b0834775232bb13b270376753f369e86fdd82162e33ec692c9ae189bc18e9e71a51258395120998c8005f38f1b",
    "signer": "0x52C54744FeC93B156A460Db7FccF10e22b6FEdf0",
    "userId": "194963084"
  }
}