{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe7f70ee0646855ae30b22d0872ba76b5faa1ce7db00000cb9fe7e850ccaf6626",
    "signature": "0xa9796854d265a505b130c419124b486a13dd1dc481d0a7712f32d43b35c31e3075f34d08e58a6173dcb423b563614c6fb9b4a444cf9fd0fc854835c0eadf34541c",
    "signer": "0xFFa47Ef31b52CcEEA1CE9d5e20cbc9f8D59b6915",
    "userId": "655264080"
  }
}