{
  "manageEntity": {
    "action": "Save",
    "entityId": "111199988",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaa319bcc3e48bb2dc5ddb26a37c11d375f432810712c237ec1160001d9aa6b02",
    "signature": "0x17ffd2bb45297a0e5618a01efbcf61a3a748187558a269351980f91053ceeeca1a190f734b973e66802da7f06df53b2ec9c1dc3540fa90dca1ecbf4a4ce4a51f1b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}