{
  "manageEntity": {
    "action": "Save",
    "entityId": "1581111995",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4ab7814280e6c2ac14e613d48598cb72ee290412559d4be76b30182e659a60c6",
    "signature": "0xad1b156172b4e7e67ba84843168ec9adc010416e6f455430b0cae546a255d4bf750cb48f35f3ed18135b9dc151ef5cdd48327cd541173085367e7ab15ab13ab01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}