{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7597c4e662e3495820f252b4ec5d516d9a3c20938689ef1c0630d566b88156e9",
    "signature": "0x57660f364639977259aaad206c41befa9206c4e3104ad60c7021372787a3114d71c41592dd106529c0f127c82996fd1f99de6448b778c8e5f199f6295c2bcc701b",
    "signer": "0x1Fcc9309277ca1De97600de80d52EA2fDC732aD4",
    "userId": "701967908"
  }
}