{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe534c0f66b239cc03504537bf85b02932c984721924cfa52ba5f7d621573ccc9",
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    "signer": "0xdd257a65C3E6b2f9019ee50DFd152306BC197EE8",
    "userId": "121094478"
  }
}