{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd9e7ce7645b679fffa3ad6e12ad10ec2c8c1afca5ff6720eb562f6c3eccaf9f3",
    "signature": "0x2643c936804b7e5d94305f7eb2517f6e408e2a118d917ea55e32fa8ca066d39e6e7014e75b7e8af69332d9f36c40e3666e45473c07d7419e453290c8fa5be3701b",
    "signer": "0xE4602a924B4ac812C947720727ffd05EC9d8280d",
    "userId": "714091688"
  }
}