{
  "manageEntity": {
    "action": "Save",
    "entityId": "1888342767",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc5ad55d168ed497304ede09f33027a6ac60b4443e9f9ac30b3ccb119e9c54488",
    "signature": "0x771eafd3cb72751c7ded52603800faf7856e9023e2586256d74e9a43d483605418632102abf97af3f59d69c81cbe1b28525ee983dc847f50ec8ec8f4bd01bafb1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}