{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2e5240a10fcf9ff4a941395078009bdd0101b70950aa1ad01bb1eb5dce7965c1",
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    "signer": "0x57e1121F22B3722Da80a80F4a32a643BE4943bE9",
    "userId": "774961868"
  }
}