{
  "manageEntity": {
    "action": "Save",
    "entityId": "624377100",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f256abddc6da105ae71a1a204ff9e2f9ce2fa40579648fd1466fb2ce9a6a5f1",
    "signature": "0x8131bd9930f23ad9792be4c6e177dddbcc06035769aad603b10389be744f10044f362e81ff5f9016b1d6563a1417ff598803fdee6911776f39fa3d93a565e1081c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}