{
  "manageEntity": {
    "action": "Save",
    "entityId": "402820308",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4f479baeebf4f22067cac5f0978d62823cef37b2071f814f696da365fadf962f",
    "signature": "0x5e1af20c5f6311ce2a763e4235408a7e07344876ac97f946641465d1a1864edf4d8099a6f384ef73e31e10a8626f90de675d8270dc2f4c052504e536d09ce8e11b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}