{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a32b99e68977ebb40d9e4c1efa50b476dafe204f190ff2b004e76c3229e0297",
    "signature": "0xafd15048d87ba5c1f373631a6417ca33f15c948cb306363ee8f337548616c5655ac6bc4a8587eef9e278f03a8129eb0d4951fce2de3dfbd328e5e49d834f818d1c",
    "signer": "0xE5DbE6Dad42e6bdCa67eCD952F5d0a1d69fFCef5",
    "userId": "88788"
  }
}