{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x064495ca0130fef004e4827192e67127807aa10c3917c3ddf599d77e779a0003",
    "signature": "0x59c0b2cbcfd437cee336c3191294699c958522c8bf11298acbe59959d3663b232a20da5a6b495c6217280ba814a0fbd724136b402cb3d096fc9e4e62eb1a232f1c",
    "signer": "0xce728805CE8D9389db39C026804151A65D5e8c71",
    "userId": "321430592"
  }
}