{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x26bc6207537144810831f91782492b7596af0f9e57c0a37ef16b76426ff2329b",
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    "signer": "0x4180d53Fa7Aca17354AA923EAAaea9Cd343A43e2",
    "userId": "389723793"
  }
}