{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7f2656225363d1149e5a759a18a9f86fd8ca3e3c74c11a0ba931d3bb0daebc75",
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    "signer": "0xaC0d0e0F39E32baE28394E2d39Dd82Cbc14Fc0FD",
    "userId": "719059057"
  }
}