{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb7a1a1751e2472392711de953f4dc7c80e7b78b773178a6fb431e67d8cb629cf",
    "signature": "0xaf2f5a5669a5d5d73568ee8bd404fd5805da341d6a2dca27779cf3a90befd7e95f1c5959ed97c2e53386568a38497678b75301916bf09c95ff6a8ba53f3cad041b",
    "signer": "0x2Bd29Dee908076e063DC46eCaed3cb58E0aac740",
    "userId": "909324014"
  }
}