{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d99d936222a5a960ef02aca5b318709410b765eab4312e7fbcd43763e1ab72f",
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    "signer": "0x0e28ef2789040667a2ed8d51feDa5e8FeeD3f278",
    "userId": "958178685"
  }
}