{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe35092ce259ffdfa3fcd071e77fd2ca55acda3907cad7409f3c001b1701f064c",
    "signature": "0x351d408183ca6e20b76f8c2f72331d6a651a93f402894cd04371809a52c0834c5f8e8aa3c918e448c65ae47ce9fe50f82805909adeab25a655990e5159993c301c",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}