{
  "manageEntity": {
    "action": "Save",
    "entityId": "1437237075",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x65ac89699248d4bd96293d1fb79fd5f86f7851ef18d72423922ba22ff2be7542",
    "signature": "0x7cda2f76da236e83f865a069784f5dba3ead76d749e22dfd1dde6f7b47d1ee6418fb5c16cf1b2be1687c32c5f73b5bef6658c24a511047c0729603d747618dd51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}