{
  "manageEntity": {
    "action": "Save",
    "entityId": "1533900850",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x93c681a699b9a280ffaea7c3dad57cac025ac7b9f96e15f36c42d653fc12a7e4",
    "signature": "0x38311ee5461df8d7ce136f48df4cebc4a94b39790aa2feebf53f1b733401594632916b9e50181a6ea1b24583d4297fb13187b8a692779a02a8bf617af1494e7d1c",
    "signer": "0xc4118DbEEF2f4052A1Ccf7587423749ef4313b4F",
    "userId": "635458432"
  }
}