{
  "manageEntity": {
    "action": "Save",
    "entityId": "1567662566",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbe8148b2afc41ee3d63ce4225be186d1be6779a027d741a6ee6713bd76bd06f4",
    "signature": "0xe477e649adbdc56f7c471486c23c2785f6e05e1873b000acdad1d07cf6de86c242997881592595d534f9edad2de4ac30047c73a9e2b8949e8d7efd42fc8c19131c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}