{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7763d62c3e96f3cab5d3e5c29594ca02427fdb66ef8f951c28da172a5afad551",
    "signature": "0x4f1a9a7c57ca2988882beac31df3ba4faa79602a4f0311d5fe95643c1310246d15efc64f0a901e0e76722ecb1bf2c8316042955e6844de667e68e69e39be3c631c",
    "signer": "0x1A03dB80e576Ab52a1E1852ba81778ae8f8f3f95",
    "userId": "876735576"
  }
}