{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2c26e0046fa133452b377a6bcfcb6d3f2153bdc77be88bd85e2bfb83f53c249",
    "signature": "0xceab0cd6468f14c6c37d43ade045df992d3d27a934e058a2ad5082cc287092643d095c0a2f66eb75c082eb2cf870b1ed22a27213accbd38eb3e7b8e40ce0c98f1c",
    "signer": "0xfE3F8897Cb342Fe4986Eb4db3e9C86c6bE6eA694",
    "userId": "548022573"
  }
}