{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd6eaec6bc9f559abd78efcc14f70588a7fd755c4c76d1a572f241828b2df38bf",
    "signature": "0x929a2828572f985fb9920d157f92e10e34713247569be2393234a811bdf121f5020ab6406ea99883c94f625a5e4e682e5665b901a7723a290c4d342fe06135be1c",
    "signer": "0x17527E4F69cefe2a5f104a7dC79972D9E79f0BD3",
    "userId": "685553279"
  }
}