{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa0585698d76ededfe26ed718aa80ee0bf822c723c4b48da95f08a16fc7290c11",
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    "signer": "0xd4Fa8f128FA7719ec4e53Aff396d4698e55617Ea",
    "userId": "267344200"
  }
}