{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaf9fd1e397c9eecfa7afa2b33f823e15416cfc5e3c5129f38d93f30268c95654",
    "signature": "0x8ee7b6535ec3d2d871c495f30d01bcb41389bd50fcb8844a845f442fa4263e255dac85bf436c848908ba037bab44083c67d4a47bc11534f961542bd374ad44581b",
    "signer": "0x219dA21889F2ae8aFb067B6bC9626439bEB48907",
    "userId": "700802422"
  }
}