{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7cad60413b91ba844a9b1676d482258ac63789a6c87cac22337306c79478845b",
    "signature": "0xa5afa45ecc92e8ee1e4e83e949602bf55216478206a27604b24c6fb6c3a6034664ba5a00aba474240f2605144f10e44473e69915693fd89a1c3a5c531ec6483d1c",
    "signer": "0x9DC85A53726bD5aA08B975Fa1Ba2B3882a148aff",
    "userId": "870351659"
  }
}