{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x04cf4c2d753886889aba7fbc4424bd6c1a633295e12ed16262ec25140eb1eef8",
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    "signer": "0x14134DBD05b0516e684ac164fDd5D3869ACc2388",
    "userId": "305860963"
  }
}