{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x43dcbfcd9944d88bb571e33ac1a823f85d7fa9bcf7e61b8314fa01f2e912acb1",
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    "signer": "0x5D0372d2E54966695E3D7a02EF5228516b617eBa",
    "userId": "55079889"
  }
}