{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5bdeb4e56627c0dd2e575da7026b973c7091fb056f22f0ccfbc923e3b37c5140",
    "signature": "0xc084daddf19cc64566469f70520be527b824bfa34ab3895d74ba81e5293561a51aa82eb4b3306b36a6171704ac1bd97a9420966bc363f9876ace56568aa95dd41b",
    "signer": "0xaAB195cac4029fce09bd166F1546E1a76049c50c",
    "userId": "844451279"
  }
}